diff --git a/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/ParticipantsClient.java b/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/ParticipantsClient.java
index ae105de56..5d5e5a1df 100644
--- a/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/ParticipantsClient.java
+++ b/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/ParticipantsClient.java
@@ -752,6 +752,7 @@ public final AnalyzeContentResponse analyzeContent(String participant, TextInput
    *                   .toString())
    *           .setReplyAudioConfig(OutputAudioConfig.newBuilder().build())
    *           .setQueryParams(QueryParameters.newBuilder().build())
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .setRequestId("requestId693933066")
    *           .build();
    *   AnalyzeContentResponse response = participantsClient.analyzeContent(request);
@@ -785,6 +786,7 @@ public final AnalyzeContentResponse analyzeContent(AnalyzeContentRequest request
    *                   .toString())
    *           .setReplyAudioConfig(OutputAudioConfig.newBuilder().build())
    *           .setQueryParams(QueryParameters.newBuilder().build())
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .setRequestId("requestId693933066")
    *           .build();
    *   ApiFuture<AnalyzeContentResponse> future =
@@ -872,6 +874,7 @@ public final SuggestArticlesResponse suggestArticles(String parent) {
    *                       "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
    *                   .toString())
    *           .setContextSize(1116903569)
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .build();
    *   SuggestArticlesResponse response = participantsClient.suggestArticles(request);
    * }
@@ -903,6 +906,7 @@ public final SuggestArticlesResponse suggestArticles(SuggestArticlesRequest requ
    *                       "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
    *                   .toString())
    *           .setContextSize(1116903569)
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .build();
    *   ApiFuture<SuggestArticlesResponse> future =
    *       participantsClient.suggestArticlesCallable().futureCall(request);
@@ -990,6 +994,7 @@ public final SuggestFaqAnswersResponse suggestFaqAnswers(String parent) {
    *                       "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
    *                   .toString())
    *           .setContextSize(1116903569)
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .build();
    *   SuggestFaqAnswersResponse response = participantsClient.suggestFaqAnswers(request);
    * }
@@ -1021,6 +1026,7 @@ public final SuggestFaqAnswersResponse suggestFaqAnswers(SuggestFaqAnswersReques
    *                       "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
    *                   .toString())
    *           .setContextSize(1116903569)
+   *           .setAssistQueryParams(AssistQueryParameters.newBuilder().build())
    *           .build();
    *   ApiFuture<SuggestFaqAnswersResponse> future =
    *       participantsClient.suggestFaqAnswersCallable().futureCall(request);
diff --git a/google-cloud-dialogflow/src/test/java/com/google/cloud/dialogflow/v2/ParticipantsClientTest.java b/google-cloud-dialogflow/src/test/java/com/google/cloud/dialogflow/v2/ParticipantsClientTest.java
index b1cfdd7e8..ff981bc79 100644
--- a/google-cloud-dialogflow/src/test/java/com/google/cloud/dialogflow/v2/ParticipantsClientTest.java
+++ b/google-cloud-dialogflow/src/test/java/com/google/cloud/dialogflow/v2/ParticipantsClientTest.java
@@ -32,6 +32,7 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
 import java.util.UUID;
 import javax.annotation.Generated;
@@ -89,6 +90,7 @@ public void createParticipantTest() throws Exception {
                         "[PROJECT]", "[CONVERSATION]", "[PARTICIPANT]")
                     .toString())
             .setSipRecordingMediaLabel("sipRecordingMediaLabel-1887770873")
+            .putAllDocumentsMetadataFilters(new HashMap<String, String>())
             .build();
     mockParticipants.addResponse(expectedResponse);
 
@@ -136,6 +138,7 @@ public void createParticipantTest2() throws Exception {
                         "[PROJECT]", "[CONVERSATION]", "[PARTICIPANT]")
                     .toString())
             .setSipRecordingMediaLabel("sipRecordingMediaLabel-1887770873")
+            .putAllDocumentsMetadataFilters(new HashMap<String, String>())
             .build();
     mockParticipants.addResponse(expectedResponse);
 
@@ -181,6 +184,7 @@ public void getParticipantTest() throws Exception {
                         "[PROJECT]", "[CONVERSATION]", "[PARTICIPANT]")
                     .toString())
             .setSipRecordingMediaLabel("sipRecordingMediaLabel-1887770873")
+            .putAllDocumentsMetadataFilters(new HashMap<String, String>())
             .build();
     mockParticipants.addResponse(expectedResponse);
 
@@ -227,6 +231,7 @@ public void getParticipantTest2() throws Exception {
                         "[PROJECT]", "[CONVERSATION]", "[PARTICIPANT]")
                     .toString())
             .setSipRecordingMediaLabel("sipRecordingMediaLabel-1887770873")
+            .putAllDocumentsMetadataFilters(new HashMap<String, String>())
             .build();
     mockParticipants.addResponse(expectedResponse);
 
@@ -359,6 +364,7 @@ public void updateParticipantTest() throws Exception {
                         "[PROJECT]", "[CONVERSATION]", "[PARTICIPANT]")
                     .toString())
             .setSipRecordingMediaLabel("sipRecordingMediaLabel-1887770873")
+            .putAllDocumentsMetadataFilters(new HashMap<String, String>())
             .build();
     mockParticipants.addResponse(expectedResponse);
 
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequest.java
index e549aa2a3..b3f884623 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+ * The request message for
+ * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.AnalyzeContentRequest}
@@ -147,6 +148,23 @@ private AnalyzeContentRequest(
               java.lang.String s = input.readStringRequireUtf8();
 
               requestId_ = s;
+              break;
+            }
+          case 114:
+            {
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder subBuilder = null;
+              if (assistQueryParams_ != null) {
+                subBuilder = assistQueryParams_.toBuilder();
+              }
+              assistQueryParams_ =
+                  input.readMessage(
+                      com.google.cloud.dialogflow.v2.AssistQueryParameters.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(assistQueryParams_);
+                assistQueryParams_ = subBuilder.buildPartial();
+              }
+
               break;
             }
           default:
@@ -497,6 +515,55 @@ public com.google.cloud.dialogflow.v2.QueryParametersOrBuilder getQueryParamsOrB
     return getQueryParams();
   }
 
+  public static final int ASSIST_QUERY_PARAMS_FIELD_NUMBER = 14;
+  private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  @java.lang.Override
+  public boolean hasAssistQueryParams() {
+    return assistQueryParams_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+    return assistQueryParams_ == null
+        ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+        : assistQueryParams_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+      getAssistQueryParamsOrBuilder() {
+    return getAssistQueryParams();
+  }
+
   public static final int REQUEST_ID_FIELD_NUMBER = 11;
   private volatile java.lang.Object requestId_;
   /**
@@ -582,6 +649,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(requestId_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 11, requestId_);
     }
+    if (assistQueryParams_ != null) {
+      output.writeMessage(14, getAssistQueryParams());
+    }
     unknownFields.writeTo(output);
   }
 
@@ -613,6 +683,9 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(requestId_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(11, requestId_);
     }
+    if (assistQueryParams_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(14, getAssistQueryParams());
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -638,6 +711,10 @@ public boolean equals(final java.lang.Object obj) {
     if (hasQueryParams()) {
       if (!getQueryParams().equals(other.getQueryParams())) return false;
     }
+    if (hasAssistQueryParams() != other.hasAssistQueryParams()) return false;
+    if (hasAssistQueryParams()) {
+      if (!getAssistQueryParams().equals(other.getAssistQueryParams())) return false;
+    }
     if (!getRequestId().equals(other.getRequestId())) return false;
     if (!getInputCase().equals(other.getInputCase())) return false;
     switch (inputCase_) {
@@ -671,6 +748,10 @@ public int hashCode() {
       hash = (37 * hash) + QUERY_PARAMS_FIELD_NUMBER;
       hash = (53 * hash) + getQueryParams().hashCode();
     }
+    if (hasAssistQueryParams()) {
+      hash = (37 * hash) + ASSIST_QUERY_PARAMS_FIELD_NUMBER;
+      hash = (53 * hash) + getAssistQueryParams().hashCode();
+    }
     hash = (37 * hash) + REQUEST_ID_FIELD_NUMBER;
     hash = (53 * hash) + getRequestId().hashCode();
     switch (inputCase_) {
@@ -789,7 +870,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+   * The request message for
+   * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.AnalyzeContentRequest}
@@ -844,6 +926,12 @@ public Builder clear() {
         queryParams_ = null;
         queryParamsBuilder_ = null;
       }
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
       requestId_ = "";
 
       inputCase_ = 0;
@@ -900,6 +988,11 @@ public com.google.cloud.dialogflow.v2.AnalyzeContentRequest buildPartial() {
       } else {
         result.queryParams_ = queryParamsBuilder_.build();
       }
+      if (assistQueryParamsBuilder_ == null) {
+        result.assistQueryParams_ = assistQueryParams_;
+      } else {
+        result.assistQueryParams_ = assistQueryParamsBuilder_.build();
+      }
       result.requestId_ = requestId_;
       result.inputCase_ = inputCase_;
       onBuilt();
@@ -962,6 +1055,9 @@ public Builder mergeFrom(com.google.cloud.dialogflow.v2.AnalyzeContentRequest ot
       if (other.hasQueryParams()) {
         mergeQueryParams(other.getQueryParams());
       }
+      if (other.hasAssistQueryParams()) {
+        mergeAssistQueryParams(other.getAssistQueryParams());
+      }
       if (!other.getRequestId().isEmpty()) {
         requestId_ = other.requestId_;
         onChanged();
@@ -1978,6 +2074,196 @@ public com.google.cloud.dialogflow.v2.QueryParametersOrBuilder getQueryParamsOrB
       return queryParamsBuilder_;
     }
 
+    private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        assistQueryParamsBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     *
+     * @return Whether the assistQueryParams field is set.
+     */
+    public boolean hasAssistQueryParams() {
+      return assistQueryParamsBuilder_ != null || assistQueryParams_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     *
+     * @return The assistQueryParams.
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      } else {
+        return assistQueryParamsBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        assistQueryParams_ = value;
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder builderForValue) {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = builderForValue.build();
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public Builder mergeAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (assistQueryParams_ != null) {
+          assistQueryParams_ =
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.newBuilder(assistQueryParams_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          assistQueryParams_ = value;
+        }
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public Builder clearAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+        onChanged();
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder
+        getAssistQueryParamsBuilder() {
+
+      onChanged();
+      return getAssistQueryParamsFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+        getAssistQueryParamsOrBuilder() {
+      if (assistQueryParamsBuilder_ != null) {
+        return assistQueryParamsBuilder_.getMessageOrBuilder();
+      } else {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        getAssistQueryParamsFieldBuilder() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParamsBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.dialogflow.v2.AssistQueryParameters,
+                com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+                com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>(
+                getAssistQueryParams(), getParentForChildren(), isClean());
+        assistQueryParams_ = null;
+      }
+      return assistQueryParamsBuilder_;
+    }
+
     private java.lang.Object requestId_ = "";
     /**
      *
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequestOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequestOrBuilder.java
index 680131bd3..4054b595e 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequestOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentRequestOrBuilder.java
@@ -208,6 +208,41 @@ public interface AnalyzeContentRequestOrBuilder
    */
   com.google.cloud.dialogflow.v2.QueryParametersOrBuilder getQueryParamsOrBuilder();
 
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  boolean hasAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 14;</code>
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder getAssistQueryParamsOrBuilder();
+
   /**
    *
    *
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponse.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponse.java
index b17a9b27d..bb484ab71 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponse.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponse.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The response message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+ * The response message for
+ * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.AnalyzeContentResponse}
@@ -345,7 +346,9 @@ public com.google.cloud.dialogflow.v2.OutputAudioOrBuilder getReplyAudioOrBuilde
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -363,7 +366,9 @@ public boolean hasAutomatedAgentReply() {
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -383,7 +388,9 @@ public com.google.cloud.dialogflow.v2.AutomatedAgentReply getAutomatedAgentReply
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -450,7 +457,8 @@ public com.google.cloud.dialogflow.v2.MessageOrBuilder getMessageOrBuilder() {
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -467,7 +475,8 @@ public com.google.cloud.dialogflow.v2.MessageOrBuilder getMessageOrBuilder() {
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -484,7 +493,8 @@ public com.google.cloud.dialogflow.v2.MessageOrBuilder getMessageOrBuilder() {
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -500,7 +510,8 @@ public int getHumanAgentSuggestionResultsCount() {
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -516,7 +527,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getHumanAgentSuggestionRe
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -536,7 +548,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getHumanAgentSuggestionRe
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -553,7 +566,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getHumanAgentSuggestionRe
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -570,7 +584,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getHumanAgentSuggestionRe
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -586,7 +601,8 @@ public int getEndUserSuggestionResultsCount() {
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -602,7 +618,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getEndUserSuggestionResul
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -911,7 +928,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The response message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+   * The response message for
+   * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.AnalyzeContentResponse}
@@ -1601,7 +1619,9 @@ public com.google.cloud.dialogflow.v2.OutputAudioOrBuilder getReplyAudioOrBuilde
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1618,7 +1638,9 @@ public boolean hasAutomatedAgentReply() {
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1641,7 +1663,9 @@ public com.google.cloud.dialogflow.v2.AutomatedAgentReply getAutomatedAgentReply
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1667,7 +1691,9 @@ public Builder setAutomatedAgentReply(
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1690,7 +1716,9 @@ public Builder setAutomatedAgentReply(
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1720,7 +1748,9 @@ public Builder mergeAutomatedAgentReply(
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1743,7 +1773,9 @@ public Builder clearAutomatedAgentReply() {
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1761,7 +1793,9 @@ public Builder clearAutomatedAgentReply() {
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -1783,7 +1817,9 @@ public Builder clearAutomatedAgentReply() {
      * Only set if a Dialogflow automated agent has responded.
      * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
      * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-     * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+     * are always empty, use
+     * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+     * instead.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -2013,7 +2049,8 @@ private void ensureHumanAgentSuggestionResultsIsMutable() {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2034,7 +2071,8 @@ private void ensureHumanAgentSuggestionResultsIsMutable() {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2054,7 +2092,8 @@ public int getHumanAgentSuggestionResultsCount() {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2075,7 +2114,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getHumanAgentSuggestionRe
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2102,7 +2142,8 @@ public Builder setHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2126,7 +2167,8 @@ public Builder setHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2153,7 +2195,8 @@ public Builder addHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2180,7 +2223,8 @@ public Builder addHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2204,7 +2248,8 @@ public Builder addHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2228,7 +2273,8 @@ public Builder addHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2253,7 +2299,8 @@ public Builder addAllHumanAgentSuggestionResults(
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2276,7 +2323,8 @@ public Builder clearHumanAgentSuggestionResults() {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2299,7 +2347,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2316,7 +2365,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2337,7 +2387,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2358,7 +2409,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2376,7 +2428,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2394,7 +2447,8 @@ public Builder removeHumanAgentSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for most recent human agent. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
      * </pre>
      *
@@ -2450,7 +2504,8 @@ private void ensureEndUserSuggestionResultsIsMutable() {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2470,7 +2525,8 @@ private void ensureEndUserSuggestionResultsIsMutable() {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2489,7 +2545,8 @@ public int getEndUserSuggestionResultsCount() {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2508,7 +2565,8 @@ public com.google.cloud.dialogflow.v2.SuggestionResult getEndUserSuggestionResul
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2534,7 +2592,8 @@ public Builder setEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2557,7 +2616,8 @@ public Builder setEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2583,7 +2643,8 @@ public Builder addEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2609,7 +2670,8 @@ public Builder addEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2632,7 +2694,8 @@ public Builder addEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2655,7 +2718,8 @@ public Builder addEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2678,7 +2742,8 @@ public Builder addAllEndUserSuggestionResults(
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2700,7 +2765,8 @@ public Builder clearEndUserSuggestionResults() {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2722,7 +2788,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2738,7 +2805,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2758,7 +2826,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2778,7 +2847,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2795,7 +2865,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
@@ -2812,7 +2883,8 @@ public Builder removeEndUserSuggestionResults(int index) {
      *
      * <pre>
      * The suggestions for end user. The order is the same as
-     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+     * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+     * of
      * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
      * </pre>
      *
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponseOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponseOrBuilder.java
index cd38d619f..d9d173436 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponseOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AnalyzeContentResponseOrBuilder.java
@@ -118,7 +118,9 @@ public interface AnalyzeContentResponseOrBuilder
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -133,7 +135,9 @@ public interface AnalyzeContentResponseOrBuilder
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -148,7 +152,9 @@ public interface AnalyzeContentResponseOrBuilder
    * Only set if a Dialogflow automated agent has responded.
    * Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
    * and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-   * are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+   * are always empty, use
+   * [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+   * instead.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.AutomatedAgentReply automated_agent_reply = 3;</code>
@@ -195,7 +201,8 @@ public interface AnalyzeContentResponseOrBuilder
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -209,7 +216,8 @@ public interface AnalyzeContentResponseOrBuilder
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -222,7 +230,8 @@ public interface AnalyzeContentResponseOrBuilder
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -235,7 +244,8 @@ public interface AnalyzeContentResponseOrBuilder
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -249,7 +259,8 @@ public interface AnalyzeContentResponseOrBuilder
    *
    * <pre>
    * The suggestions for most recent human agent. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
    * </pre>
    *
@@ -264,7 +275,8 @@ com.google.cloud.dialogflow.v2.SuggestionResultOrBuilder getHumanAgentSuggestion
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -277,7 +289,8 @@ com.google.cloud.dialogflow.v2.SuggestionResultOrBuilder getHumanAgentSuggestion
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -290,7 +303,8 @@ com.google.cloud.dialogflow.v2.SuggestionResultOrBuilder getHumanAgentSuggestion
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -303,7 +317,8 @@ com.google.cloud.dialogflow.v2.SuggestionResultOrBuilder getHumanAgentSuggestion
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
@@ -317,7 +332,8 @@ com.google.cloud.dialogflow.v2.SuggestionResultOrBuilder getHumanAgentSuggestion
    *
    * <pre>
    * The suggestions for end user. The order is the same as
-   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+   * [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+   * of
    * [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
    * </pre>
    *
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParameters.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParameters.java
new file mode 100644
index 000000000..85b1d6809
--- /dev/null
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParameters.java
@@ -0,0 +1,960 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/dialogflow/v2/participant.proto
+
+package com.google.cloud.dialogflow.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Represents the parameters of human assist query.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.dialogflow.v2.AssistQueryParameters}
+ */
+public final class AssistQueryParameters extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.dialogflow.v2.AssistQueryParameters)
+    AssistQueryParametersOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use AssistQueryParameters.newBuilder() to construct.
+  private AssistQueryParameters(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private AssistQueryParameters() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new AssistQueryParameters();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private AssistQueryParameters(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                documentsMetadataFilters_ =
+                    com.google.protobuf.MapField.newMapField(
+                        DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000001;
+              }
+              com.google.protobuf.MapEntry<java.lang.String, java.lang.String>
+                  documentsMetadataFilters__ =
+                      input.readMessage(
+                          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry
+                              .getParserForType(),
+                          extensionRegistry);
+              documentsMetadataFilters_
+                  .getMutableMap()
+                  .put(documentsMetadataFilters__.getKey(), documentsMetadataFilters__.getValue());
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.dialogflow.v2.ParticipantProto
+        .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor;
+  }
+
+  @SuppressWarnings({"rawtypes"})
+  @java.lang.Override
+  protected com.google.protobuf.MapField internalGetMapField(int number) {
+    switch (number) {
+      case 1:
+        return internalGetDocumentsMetadataFilters();
+      default:
+        throw new RuntimeException("Invalid map field number: " + number);
+    }
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.dialogflow.v2.ParticipantProto
+        .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.class,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder.class);
+  }
+
+  public static final int DOCUMENTS_METADATA_FILTERS_FIELD_NUMBER = 1;
+
+  private static final class DocumentsMetadataFiltersDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<java.lang.String, java.lang.String> defaultEntry =
+        com.google.protobuf.MapEntry.<java.lang.String, java.lang.String>newDefaultInstance(
+            com.google.cloud.dialogflow.v2.ParticipantProto
+                .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_descriptor,
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "",
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "");
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+      documentsMetadataFilters_;
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+      internalGetDocumentsMetadataFilters() {
+    if (documentsMetadataFilters_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(
+          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+    }
+    return documentsMetadataFilters_;
+  }
+
+  public int getDocumentsMetadataFiltersCount() {
+    return internalGetDocumentsMetadataFilters().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  @java.lang.Override
+  public boolean containsDocumentsMetadataFilters(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetDocumentsMetadataFilters().getMap().containsKey(key);
+  }
+  /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters() {
+    return getDocumentsMetadataFiltersMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap() {
+    return internalGetDocumentsMetadataFilters().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  @java.lang.Override
+  public java.lang.String getDocumentsMetadataFiltersOrDefault(
+      java.lang.String key, java.lang.String defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map =
+        internalGetDocumentsMetadataFilters().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  @java.lang.Override
+  public java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map =
+        internalGetDocumentsMetadataFilters().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+        output,
+        internalGetDocumentsMetadataFilters(),
+        DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry,
+        1);
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (java.util.Map.Entry<java.lang.String, java.lang.String> entry :
+        internalGetDocumentsMetadataFilters().getMap().entrySet()) {
+      com.google.protobuf.MapEntry<java.lang.String, java.lang.String> documentsMetadataFilters__ =
+          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry
+              .newBuilderForType()
+              .setKey(entry.getKey())
+              .setValue(entry.getValue())
+              .build();
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(1, documentsMetadataFilters__);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.dialogflow.v2.AssistQueryParameters)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.dialogflow.v2.AssistQueryParameters other =
+        (com.google.cloud.dialogflow.v2.AssistQueryParameters) obj;
+
+    if (!internalGetDocumentsMetadataFilters().equals(other.internalGetDocumentsMetadataFilters()))
+      return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (!internalGetDocumentsMetadataFilters().getMap().isEmpty()) {
+      hash = (37 * hash) + DOCUMENTS_METADATA_FILTERS_FIELD_NUMBER;
+      hash = (53 * hash) + internalGetDocumentsMetadataFilters().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.dialogflow.v2.AssistQueryParameters prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Represents the parameters of human assist query.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.dialogflow.v2.AssistQueryParameters}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.dialogflow.v2.AssistQueryParameters)
+      com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.dialogflow.v2.ParticipantProto
+          .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor;
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMapField(int number) {
+      switch (number) {
+        case 1:
+          return internalGetDocumentsMetadataFilters();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+      switch (number) {
+        case 1:
+          return internalGetMutableDocumentsMetadataFilters();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.dialogflow.v2.ParticipantProto
+          .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.class,
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder.class);
+    }
+
+    // Construct using com.google.cloud.dialogflow.v2.AssistQueryParameters.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      internalGetMutableDocumentsMetadataFilters().clear();
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.dialogflow.v2.ParticipantProto
+          .internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters getDefaultInstanceForType() {
+      return com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters build() {
+      com.google.cloud.dialogflow.v2.AssistQueryParameters result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters buildPartial() {
+      com.google.cloud.dialogflow.v2.AssistQueryParameters result =
+          new com.google.cloud.dialogflow.v2.AssistQueryParameters(this);
+      int from_bitField0_ = bitField0_;
+      result.documentsMetadataFilters_ = internalGetDocumentsMetadataFilters();
+      result.documentsMetadataFilters_.makeImmutable();
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.dialogflow.v2.AssistQueryParameters) {
+        return mergeFrom((com.google.cloud.dialogflow.v2.AssistQueryParameters) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.dialogflow.v2.AssistQueryParameters other) {
+      if (other == com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance())
+        return this;
+      internalGetMutableDocumentsMetadataFilters()
+          .mergeFrom(other.internalGetDocumentsMetadataFilters());
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.dialogflow.v2.AssistQueryParameters parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.dialogflow.v2.AssistQueryParameters) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        documentsMetadataFilters_;
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        internalGetDocumentsMetadataFilters() {
+      if (documentsMetadataFilters_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(
+            DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+      }
+      return documentsMetadataFilters_;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        internalGetMutableDocumentsMetadataFilters() {
+      onChanged();
+      ;
+      if (documentsMetadataFilters_ == null) {
+        documentsMetadataFilters_ =
+            com.google.protobuf.MapField.newMapField(
+                DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+      }
+      if (!documentsMetadataFilters_.isMutable()) {
+        documentsMetadataFilters_ = documentsMetadataFilters_.copy();
+      }
+      return documentsMetadataFilters_;
+    }
+
+    public int getDocumentsMetadataFiltersCount() {
+      return internalGetDocumentsMetadataFilters().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    @java.lang.Override
+    public boolean containsDocumentsMetadataFilters(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetDocumentsMetadataFilters().getMap().containsKey(key);
+    }
+    /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters() {
+      return getDocumentsMetadataFiltersMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap() {
+      return internalGetDocumentsMetadataFilters().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    @java.lang.Override
+    public java.lang.String getDocumentsMetadataFiltersOrDefault(
+        java.lang.String key, java.lang.String defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map =
+          internalGetDocumentsMetadataFilters().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    @java.lang.Override
+    public java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map =
+          internalGetDocumentsMetadataFilters().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearDocumentsMetadataFilters() {
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    public Builder removeDocumentsMetadataFilters(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getMutableDocumentsMetadataFilters() {
+      return internalGetMutableDocumentsMetadataFilters().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    public Builder putDocumentsMetadataFilters(java.lang.String key, java.lang.String value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Key-value filters on the metadata of documents returned by article
+     * suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+     */
+    public Builder putAllDocumentsMetadataFilters(
+        java.util.Map<java.lang.String, java.lang.String> values) {
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().putAll(values);
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.dialogflow.v2.AssistQueryParameters)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.dialogflow.v2.AssistQueryParameters)
+  private static final com.google.cloud.dialogflow.v2.AssistQueryParameters DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.dialogflow.v2.AssistQueryParameters();
+  }
+
+  public static com.google.cloud.dialogflow.v2.AssistQueryParameters getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<AssistQueryParameters> PARSER =
+      new com.google.protobuf.AbstractParser<AssistQueryParameters>() {
+        @java.lang.Override
+        public AssistQueryParameters parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new AssistQueryParameters(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<AssistQueryParameters> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<AssistQueryParameters> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParameters getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParametersOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParametersOrBuilder.java
new file mode 100644
index 000000000..9d7d98b33
--- /dev/null
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AssistQueryParametersOrBuilder.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/dialogflow/v2/participant.proto
+
+package com.google.cloud.dialogflow.v2;
+
+public interface AssistQueryParametersOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.dialogflow.v2.AssistQueryParameters)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  int getDocumentsMetadataFiltersCount();
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  boolean containsDocumentsMetadataFilters(java.lang.String key);
+  /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters();
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap();
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  java.lang.String getDocumentsMetadataFiltersOrDefault(
+      java.lang.String key, java.lang.String defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * Key-value filters on the metadata of documents returned by article
+   * suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; documents_metadata_filters = 1;</code>
+   */
+  java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key);
+}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReply.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReply.java
index 49b63ca26..7acdb6410 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReply.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReply.java
@@ -305,7 +305,9 @@ private AutomatedAgentReplyType(int value) {
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -320,7 +322,9 @@ public boolean hasDetectIntentResponse() {
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -337,7 +341,9 @@ public com.google.cloud.dialogflow.v2.DetectIntentResponse getDetectIntentRespon
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -789,7 +795,9 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -803,7 +811,9 @@ public boolean hasDetectIntentResponse() {
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -823,7 +833,9 @@ public com.google.cloud.dialogflow.v2.DetectIntentResponse getDetectIntentRespon
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -846,7 +858,9 @@ public Builder setDetectIntentResponse(
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -866,7 +880,9 @@ public Builder setDetectIntentResponse(
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -893,7 +909,9 @@ public Builder mergeDetectIntentResponse(
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -913,7 +931,9 @@ public Builder clearDetectIntentResponse() {
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -928,7 +948,9 @@ public Builder clearDetectIntentResponse() {
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -947,7 +969,9 @@ public Builder clearDetectIntentResponse() {
      *
      *
      * <pre>
-     * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+     * Response of the Dialogflow
+     * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+     * call.
      * </pre>
      *
      * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReplyOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReplyOrBuilder.java
index 04e651f2c..a686874fe 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReplyOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/AutomatedAgentReplyOrBuilder.java
@@ -27,7 +27,9 @@ public interface AutomatedAgentReplyOrBuilder
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -39,7 +41,9 @@ public interface AutomatedAgentReplyOrBuilder
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
@@ -51,7 +55,9 @@ public interface AutomatedAgentReplyOrBuilder
    *
    *
    * <pre>
-   * Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+   * Response of the Dialogflow
+   * [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+   * call.
    * </pre>
    *
    * <code>.google.cloud.dialogflow.v2.DetectIntentResponse detect_intent_response = 1;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ConversationProfileProto.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ConversationProfileProto.java
index 5e9ae4ade..b3f23990b 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ConversationProfileProto.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ConversationProfileProto.java
@@ -273,62 +273,62 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "ormat\"D\n\rMessageFormat\022\036\n\032MESSAGE_FORMAT"
           + "_UNSPECIFIED\020\000\022\t\n\005PROTO\020\001\022\010\n\004JSON\020\002\"3\n\rL"
           + "oggingConfig\022\"\n\032enable_stackdriver_loggi"
-          + "ng\030\003 \001(\010\"\224\001\n\021SuggestionFeature\022@\n\004type\030\001"
+          + "ng\030\003 \001(\010\"\245\001\n\021SuggestionFeature\022@\n\004type\030\001"
           + " \001(\01622.google.cloud.dialogflow.v2.Sugges"
-          + "tionFeature.Type\"=\n\004Type\022\024\n\020TYPE_UNSPECI"
-          + "FIED\020\000\022\026\n\022ARTICLE_SUGGESTION\020\001\022\007\n\003FAQ\020\0022"
-          + "\325\014\n\024ConversationProfiles\022\220\002\n\030ListConvers"
-          + "ationProfiles\022;.google.cloud.dialogflow."
-          + "v2.ListConversationProfilesRequest\032<.goo"
-          + "gle.cloud.dialogflow.v2.ListConversation"
-          + "ProfilesResponse\"y\202\323\344\223\002j\022,/v2/{parent=pr"
-          + "ojects/*}/conversationProfilesZ:\0228/v2/{p"
-          + "arent=projects/*/locations/*}/conversati"
-          + "onProfiles\332A\006parent\022\375\001\n\026GetConversationP"
-          + "rofile\0229.google.cloud.dialogflow.v2.GetC"
-          + "onversationProfileRequest\032/.google.cloud"
-          + ".dialogflow.v2.ConversationProfile\"w\202\323\344\223"
-          + "\002j\022,/v2/{name=projects/*/conversationPro"
-          + "files/*}Z:\0228/v2/{name=projects/*/locatio"
-          + "ns/*/conversationProfiles/*}\332A\004name\022\310\002\n\031"
-          + "CreateConversationProfile\022<.google.cloud"
-          + ".dialogflow.v2.CreateConversationProfile"
-          + "Request\032/.google.cloud.dialogflow.v2.Con"
-          + "versationProfile\"\273\001\202\323\344\223\002\226\001\",/v2/{parent="
-          + "projects/*}/conversationProfiles:\024conver"
-          + "sation_profileZP\"8/v2/{parent=projects/*"
-          + "/locations/*}/conversationProfiles:\024conv"
-          + "ersation_profile\332A\033parent,conversation_p"
-          + "rofile\022\367\002\n\031UpdateConversationProfile\022<.g"
-          + "oogle.cloud.dialogflow.v2.UpdateConversa"
-          + "tionProfileRequest\032/.google.cloud.dialog"
-          + "flow.v2.ConversationProfile\"\352\001\202\323\344\223\002\300\0012A/"
-          + "v2/{conversation_profile.name=projects/*"
+          + "tionFeature.Type\"N\n\004Type\022\024\n\020TYPE_UNSPECI"
+          + "FIED\020\000\022\026\n\022ARTICLE_SUGGESTION\020\001\022\007\n\003FAQ\020\002\022"
+          + "\017\n\013SMART_REPLY\020\0032\325\014\n\024ConversationProfile"
+          + "s\022\220\002\n\030ListConversationProfiles\022;.google."
+          + "cloud.dialogflow.v2.ListConversationProf"
+          + "ilesRequest\032<.google.cloud.dialogflow.v2"
+          + ".ListConversationProfilesResponse\"y\202\323\344\223\002"
+          + "j\022,/v2/{parent=projects/*}/conversationP"
+          + "rofilesZ:\0228/v2/{parent=projects/*/locati"
+          + "ons/*}/conversationProfiles\332A\006parent\022\375\001\n"
+          + "\026GetConversationProfile\0229.google.cloud.d"
+          + "ialogflow.v2.GetConversationProfileReque"
+          + "st\032/.google.cloud.dialogflow.v2.Conversa"
+          + "tionProfile\"w\202\323\344\223\002j\022,/v2/{name=projects/"
+          + "*/conversationProfiles/*}Z:\0228/v2/{name=p"
+          + "rojects/*/locations/*/conversationProfil"
+          + "es/*}\332A\004name\022\310\002\n\031CreateConversationProfi"
+          + "le\022<.google.cloud.dialogflow.v2.CreateCo"
+          + "nversationProfileRequest\032/.google.cloud."
+          + "dialogflow.v2.ConversationProfile\"\273\001\202\323\344\223"
+          + "\002\226\001\",/v2/{parent=projects/*}/conversatio"
+          + "nProfiles:\024conversation_profileZP\"8/v2/{"
+          + "parent=projects/*/locations/*}/conversat"
+          + "ionProfiles:\024conversation_profile\332A\033pare"
+          + "nt,conversation_profile\022\367\002\n\031UpdateConver"
+          + "sationProfile\022<.google.cloud.dialogflow."
+          + "v2.UpdateConversationProfileRequest\032/.go"
+          + "ogle.cloud.dialogflow.v2.ConversationPro"
+          + "file\"\352\001\202\323\344\223\002\300\0012A/v2/{conversation_profil"
+          + "e.name=projects/*/conversationProfiles/*"
+          + "}:\024conversation_profileZe2M/v2/{conversa"
+          + "tion_profile.name=projects/*/locations/*"
           + "/conversationProfiles/*}:\024conversation_p"
-          + "rofileZe2M/v2/{conversation_profile.name"
-          + "=projects/*/locations/*/conversationProf"
-          + "iles/*}:\024conversation_profile\332A conversa"
-          + "tion_profile,update_mask\022\352\001\n\031DeleteConve"
-          + "rsationProfile\022<.google.cloud.dialogflow"
-          + ".v2.DeleteConversationProfileRequest\032\026.g"
-          + "oogle.protobuf.Empty\"w\202\323\344\223\002j*,/v2/{name="
-          + "projects/*/conversationProfiles/*}Z:*8/v"
-          + "2/{name=projects/*/locations/*/conversat"
-          + "ionProfiles/*}\332A\004name\032x\312A\031dialogflow.goo"
-          + "gleapis.com\322AYhttps://www.googleapis.com"
-          + "/auth/cloud-platform,https://www.googlea"
-          + "pis.com/auth/dialogflowB\247\003\n\036com.google.c"
-          + "loud.dialogflow.v2B\030ConversationProfileP"
-          + "rotoP\001ZDgoogle.golang.org/genproto/googl"
-          + "eapis/cloud/dialogflow/v2;dialogflow\370\001\001\242"
-          + "\002\002DF\252\002\032Google.Cloud.Dialogflow.V2\352A|\n,di"
-          + "alogflow.googleapis.com/CXSecuritySettin"
-          + "gs\022Lprojects/{project}/locations/{locati"
-          + "on}/securitySettings/{security_settings}"
-          + "\352A~\n+dialogflow.googleapis.com/Conversat"
-          + "ionModel\022Oprojects/{project}/locations/{"
-          + "location}/conversationModels/{conversati"
-          + "on_model}b\006proto3"
+          + "rofile\332A conversation_profile,update_mas"
+          + "k\022\352\001\n\031DeleteConversationProfile\022<.google"
+          + ".cloud.dialogflow.v2.DeleteConversationP"
+          + "rofileRequest\032\026.google.protobuf.Empty\"w\202"
+          + "\323\344\223\002j*,/v2/{name=projects/*/conversation"
+          + "Profiles/*}Z:*8/v2/{name=projects/*/loca"
+          + "tions/*/conversationProfiles/*}\332A\004name\032x"
+          + "\312A\031dialogflow.googleapis.com\322AYhttps://w"
+          + "ww.googleapis.com/auth/cloud-platform,ht"
+          + "tps://www.googleapis.com/auth/dialogflow"
+          + "B\247\003\n\036com.google.cloud.dialogflow.v2B\030Con"
+          + "versationProfileProtoP\001ZDgoogle.golang.o"
+          + "rg/genproto/googleapis/cloud/dialogflow/"
+          + "v2;dialogflow\370\001\001\242\002\002DF\252\002\032Google.Cloud.Dia"
+          + "logflow.V2\352A|\n,dialogflow.googleapis.com"
+          + "/CXSecuritySettings\022Lprojects/{project}/"
+          + "locations/{location}/securitySettings/{s"
+          + "ecurity_settings}\352A~\n+dialogflow.googlea"
+          + "pis.com/ConversationModel\022Oprojects/{pro"
+          + "ject}/locations/{location}/conversationM"
+          + "odels/{conversation_model}b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/CreateParticipantRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/CreateParticipantRequest.java
index c5dec0acf..e96a3f4f4 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/CreateParticipantRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/CreateParticipantRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
+ * The request message for
+ * [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.CreateParticipantRequest}
@@ -416,7 +417,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
+   * The request message for
+   * [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.CreateParticipantRequest}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/GetParticipantRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/GetParticipantRequest.java
index 882a87f39..33f6154fb 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/GetParticipantRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/GetParticipantRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
+ * The request message for
+ * [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.GetParticipantRequest}
@@ -331,7 +332,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
+   * The request message for
+   * [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.GetParticipantRequest}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsRequest.java
index 1bfa830ce..ab17d5826 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+ * The request message for
+ * [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.ListParticipantsRequest}
@@ -431,7 +432,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+   * The request message for
+   * [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.ListParticipantsRequest}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsResponse.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsResponse.java
index fab7e6bc8..fbfc9beb2 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsResponse.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ListParticipantsResponse.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The response message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+ * The response message for
+ * [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.ListParticipantsResponse}
@@ -428,7 +429,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The response message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+   * The response message for
+   * [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.ListParticipantsResponse}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/Participant.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/Participant.java
index 0b1845e71..e063567c7 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/Participant.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/Participant.java
@@ -62,6 +62,7 @@ private Participant(
     if (extensionRegistry == null) {
       throw new java.lang.NullPointerException();
     }
+    int mutable_bitField0_ = 0;
     com.google.protobuf.UnknownFieldSet.Builder unknownFields =
         com.google.protobuf.UnknownFieldSet.newBuilder();
     try {
@@ -93,6 +94,25 @@ private Participant(
               sipRecordingMediaLabel_ = s;
               break;
             }
+          case 66:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                documentsMetadataFilters_ =
+                    com.google.protobuf.MapField.newMapField(
+                        DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000001;
+              }
+              com.google.protobuf.MapEntry<java.lang.String, java.lang.String>
+                  documentsMetadataFilters__ =
+                      input.readMessage(
+                          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry
+                              .getParserForType(),
+                          extensionRegistry);
+              documentsMetadataFilters_
+                  .getMutableMap()
+                  .put(documentsMetadataFilters__.getKey(), documentsMetadataFilters__.getValue());
+              break;
+            }
           default:
             {
               if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
@@ -117,6 +137,17 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
         .internal_static_google_cloud_dialogflow_v2_Participant_descriptor;
   }
 
+  @SuppressWarnings({"rawtypes"})
+  @java.lang.Override
+  protected com.google.protobuf.MapField internalGetMapField(int number) {
+    switch (number) {
+      case 8:
+        return internalGetDocumentsMetadataFilters();
+      default:
+        throw new RuntimeException("Invalid map field number: " + number);
+    }
+  }
+
   @java.lang.Override
   protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internalGetFieldAccessorTable() {
@@ -367,8 +398,8 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    *
    * <pre>
-   * Immutable. The role this participant plays in the conversation. This field must be set
-   * during participant creation and is then immutable.
+   * Immutable. The role this participant plays in the conversation. This field
+   * must be set during participant creation and is then immutable.
    * </pre>
    *
    * <code>
@@ -385,8 +416,8 @@ public int getRoleValue() {
    *
    *
    * <pre>
-   * Immutable. The role this participant plays in the conversation. This field must be set
-   * during participant creation and is then immutable.
+   * Immutable. The role this participant plays in the conversation. This field
+   * must be set during participant creation and is then immutable.
    * </pre>
    *
    * <code>
@@ -456,6 +487,182 @@ public com.google.protobuf.ByteString getSipRecordingMediaLabelBytes() {
     }
   }
 
+  public static final int DOCUMENTS_METADATA_FILTERS_FIELD_NUMBER = 8;
+
+  private static final class DocumentsMetadataFiltersDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<java.lang.String, java.lang.String> defaultEntry =
+        com.google.protobuf.MapEntry.<java.lang.String, java.lang.String>newDefaultInstance(
+            com.google.cloud.dialogflow.v2.ParticipantProto
+                .internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_descriptor,
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "",
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "");
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+      documentsMetadataFilters_;
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+      internalGetDocumentsMetadataFilters() {
+    if (documentsMetadataFilters_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(
+          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+    }
+    return documentsMetadataFilters_;
+  }
+
+  public int getDocumentsMetadataFiltersCount() {
+    return internalGetDocumentsMetadataFilters().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public boolean containsDocumentsMetadataFilters(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetDocumentsMetadataFilters().getMap().containsKey(key);
+  }
+  /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters() {
+    return getDocumentsMetadataFiltersMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap() {
+    return internalGetDocumentsMetadataFilters().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.lang.String getDocumentsMetadataFiltersOrDefault(
+      java.lang.String key, java.lang.String defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map =
+        internalGetDocumentsMetadataFilters().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map =
+        internalGetDocumentsMetadataFilters().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -479,6 +686,11 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(sipRecordingMediaLabel_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 6, sipRecordingMediaLabel_);
     }
+    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+        output,
+        internalGetDocumentsMetadataFilters(),
+        DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry,
+        8);
     unknownFields.writeTo(output);
   }
 
@@ -497,6 +709,17 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(sipRecordingMediaLabel_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, sipRecordingMediaLabel_);
     }
+    for (java.util.Map.Entry<java.lang.String, java.lang.String> entry :
+        internalGetDocumentsMetadataFilters().getMap().entrySet()) {
+      com.google.protobuf.MapEntry<java.lang.String, java.lang.String> documentsMetadataFilters__ =
+          DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry
+              .newBuilderForType()
+              .setKey(entry.getKey())
+              .setValue(entry.getValue())
+              .build();
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(8, documentsMetadataFilters__);
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -516,6 +739,8 @@ public boolean equals(final java.lang.Object obj) {
     if (!getName().equals(other.getName())) return false;
     if (role_ != other.role_) return false;
     if (!getSipRecordingMediaLabel().equals(other.getSipRecordingMediaLabel())) return false;
+    if (!internalGetDocumentsMetadataFilters().equals(other.internalGetDocumentsMetadataFilters()))
+      return false;
     if (!unknownFields.equals(other.unknownFields)) return false;
     return true;
   }
@@ -533,6 +758,10 @@ public int hashCode() {
     hash = (53 * hash) + role_;
     hash = (37 * hash) + SIP_RECORDING_MEDIA_LABEL_FIELD_NUMBER;
     hash = (53 * hash) + getSipRecordingMediaLabel().hashCode();
+    if (!internalGetDocumentsMetadataFilters().getMap().isEmpty()) {
+      hash = (37 * hash) + DOCUMENTS_METADATA_FILTERS_FIELD_NUMBER;
+      hash = (53 * hash) + internalGetDocumentsMetadataFilters().hashCode();
+    }
     hash = (29 * hash) + unknownFields.hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -651,6 +880,26 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
           .internal_static_google_cloud_dialogflow_v2_Participant_descriptor;
     }
 
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMapField(int number) {
+      switch (number) {
+        case 8:
+          return internalGetDocumentsMetadataFilters();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+      switch (number) {
+        case 8:
+          return internalGetMutableDocumentsMetadataFilters();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
     @java.lang.Override
     protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
         internalGetFieldAccessorTable() {
@@ -684,6 +933,7 @@ public Builder clear() {
 
       sipRecordingMediaLabel_ = "";
 
+      internalGetMutableDocumentsMetadataFilters().clear();
       return this;
     }
 
@@ -711,9 +961,12 @@ public com.google.cloud.dialogflow.v2.Participant build() {
     public com.google.cloud.dialogflow.v2.Participant buildPartial() {
       com.google.cloud.dialogflow.v2.Participant result =
           new com.google.cloud.dialogflow.v2.Participant(this);
+      int from_bitField0_ = bitField0_;
       result.name_ = name_;
       result.role_ = role_;
       result.sipRecordingMediaLabel_ = sipRecordingMediaLabel_;
+      result.documentsMetadataFilters_ = internalGetDocumentsMetadataFilters();
+      result.documentsMetadataFilters_.makeImmutable();
       onBuilt();
       return result;
     }
@@ -774,6 +1027,8 @@ public Builder mergeFrom(com.google.cloud.dialogflow.v2.Participant other) {
         sipRecordingMediaLabel_ = other.sipRecordingMediaLabel_;
         onChanged();
       }
+      internalGetMutableDocumentsMetadataFilters()
+          .mergeFrom(other.internalGetDocumentsMetadataFilters());
       this.mergeUnknownFields(other.unknownFields);
       onChanged();
       return this;
@@ -803,6 +1058,8 @@ public Builder mergeFrom(
       return this;
     }
 
+    private int bitField0_;
+
     private java.lang.Object name_ = "";
     /**
      *
@@ -924,8 +1181,8 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      *
      * <pre>
-     * Immutable. The role this participant plays in the conversation. This field must be set
-     * during participant creation and is then immutable.
+     * Immutable. The role this participant plays in the conversation. This field
+     * must be set during participant creation and is then immutable.
      * </pre>
      *
      * <code>
@@ -942,8 +1199,8 @@ public int getRoleValue() {
      *
      *
      * <pre>
-     * Immutable. The role this participant plays in the conversation. This field must be set
-     * during participant creation and is then immutable.
+     * Immutable. The role this participant plays in the conversation. This field
+     * must be set during participant creation and is then immutable.
      * </pre>
      *
      * <code>
@@ -963,8 +1220,8 @@ public Builder setRoleValue(int value) {
      *
      *
      * <pre>
-     * Immutable. The role this participant plays in the conversation. This field must be set
-     * during participant creation and is then immutable.
+     * Immutable. The role this participant plays in the conversation. This field
+     * must be set during participant creation and is then immutable.
      * </pre>
      *
      * <code>
@@ -984,8 +1241,8 @@ public com.google.cloud.dialogflow.v2.Participant.Role getRole() {
      *
      *
      * <pre>
-     * Immutable. The role this participant plays in the conversation. This field must be set
-     * during participant creation and is then immutable.
+     * Immutable. The role this participant plays in the conversation. This field
+     * must be set during participant creation and is then immutable.
      * </pre>
      *
      * <code>
@@ -1008,8 +1265,8 @@ public Builder setRole(com.google.cloud.dialogflow.v2.Participant.Role value) {
      *
      *
      * <pre>
-     * Immutable. The role this participant plays in the conversation. This field must be set
-     * during participant creation and is then immutable.
+     * Immutable. The role this participant plays in the conversation. This field
+     * must be set during participant creation and is then immutable.
      * </pre>
      *
      * <code>
@@ -1141,6 +1398,297 @@ public Builder setSipRecordingMediaLabelBytes(com.google.protobuf.ByteString val
       return this;
     }
 
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        documentsMetadataFilters_;
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        internalGetDocumentsMetadataFilters() {
+      if (documentsMetadataFilters_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(
+            DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+      }
+      return documentsMetadataFilters_;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        internalGetMutableDocumentsMetadataFilters() {
+      onChanged();
+      ;
+      if (documentsMetadataFilters_ == null) {
+        documentsMetadataFilters_ =
+            com.google.protobuf.MapField.newMapField(
+                DocumentsMetadataFiltersDefaultEntryHolder.defaultEntry);
+      }
+      if (!documentsMetadataFilters_.isMutable()) {
+        documentsMetadataFilters_ = documentsMetadataFilters_.copy();
+      }
+      return documentsMetadataFilters_;
+    }
+
+    public int getDocumentsMetadataFiltersCount() {
+      return internalGetDocumentsMetadataFilters().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    @java.lang.Override
+    public boolean containsDocumentsMetadataFilters(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetDocumentsMetadataFilters().getMap().containsKey(key);
+    }
+    /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters() {
+      return getDocumentsMetadataFiltersMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap() {
+      return internalGetDocumentsMetadataFilters().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    @java.lang.Override
+    public java.lang.String getDocumentsMetadataFiltersOrDefault(
+        java.lang.String key, java.lang.String defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map =
+          internalGetDocumentsMetadataFilters().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    @java.lang.Override
+    public java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map =
+          internalGetDocumentsMetadataFilters().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearDocumentsMetadataFilters() {
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder removeDocumentsMetadataFilters(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getMutableDocumentsMetadataFilters() {
+      return internalGetMutableDocumentsMetadataFilters().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder putDocumentsMetadataFilters(java.lang.String key, java.lang.String value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Key-value filters on the metadata of documents returned by
+     * article suggestion. If specified, article suggestion only returns suggested
+     * documents that match all filters in their
+     * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+     * values for a metadata key should be concatenated by comma. For example,
+     * filters to match all documents that have 'US' or 'CA' in their market
+     * metadata values and 'agent' in their user metadata values will be
+     * ```
+     * documents_metadata_filters {
+     *   key: "market"
+     *   value: "US,CA"
+     * }
+     * documents_metadata_filters {
+     *   key: "user"
+     *   value: "agent"
+     * }
+     * ```
+     * </pre>
+     *
+     * <code>
+     * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder putAllDocumentsMetadataFilters(
+        java.util.Map<java.lang.String, java.lang.String> values) {
+      internalGetMutableDocumentsMetadataFilters().getMutableMap().putAll(values);
+      return this;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantOrBuilder.java
index f1d6bd634..f44d90836 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantOrBuilder.java
@@ -56,8 +56,8 @@ public interface ParticipantOrBuilder
    *
    *
    * <pre>
-   * Immutable. The role this participant plays in the conversation. This field must be set
-   * during participant creation and is then immutable.
+   * Immutable. The role this participant plays in the conversation. This field
+   * must be set during participant creation and is then immutable.
    * </pre>
    *
    * <code>
@@ -71,8 +71,8 @@ public interface ParticipantOrBuilder
    *
    *
    * <pre>
-   * Immutable. The role this participant plays in the conversation. This field must be set
-   * during participant creation and is then immutable.
+   * Immutable. The role this participant plays in the conversation. This field
+   * must be set during participant creation and is then immutable.
    * </pre>
    *
    * <code>
@@ -111,4 +111,149 @@ public interface ParticipantOrBuilder
    * @return The bytes for sipRecordingMediaLabel.
    */
   com.google.protobuf.ByteString getSipRecordingMediaLabelBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  int getDocumentsMetadataFiltersCount();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  boolean containsDocumentsMetadataFilters(java.lang.String key);
+  /** Use {@link #getDocumentsMetadataFiltersMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFilters();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.util.Map<java.lang.String, java.lang.String> getDocumentsMetadataFiltersMap();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.lang.String getDocumentsMetadataFiltersOrDefault(
+      java.lang.String key, java.lang.String defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Key-value filters on the metadata of documents returned by
+   * article suggestion. If specified, article suggestion only returns suggested
+   * documents that match all filters in their
+   * [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+   * values for a metadata key should be concatenated by comma. For example,
+   * filters to match all documents that have 'US' or 'CA' in their market
+   * metadata values and 'agent' in their user metadata values will be
+   * ```
+   * documents_metadata_filters {
+   *   key: "market"
+   *   value: "US,CA"
+   * }
+   * documents_metadata_filters {
+   *   key: "user"
+   *   value: "agent"
+   * }
+   * ```
+   * </pre>
+   *
+   * <code>
+   * map&lt;string, string&gt; documents_metadata_filters = 8 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.lang.String getDocumentsMetadataFiltersOrThrow(java.lang.String key);
 }
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantProto.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantProto.java
index 5b1247027..2d93352b6 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantProto.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ParticipantProto.java
@@ -31,6 +31,10 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r
       internal_static_google_cloud_dialogflow_v2_Participant_descriptor;
   static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_google_cloud_dialogflow_v2_Participant_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_fieldAccessorTable;
   static final com.google.protobuf.Descriptors.Descriptor
       internal_static_google_cloud_dialogflow_v2_Message_descriptor;
   static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
@@ -119,6 +123,14 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r
       internal_static_google_cloud_dialogflow_v2_MessageAnnotation_descriptor;
   static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_google_cloud_dialogflow_v2_MessageAnnotation_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_fieldAccessorTable;
 
   public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
     return descriptor;
@@ -139,182 +151,198 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "uf/duration.proto\032 google/protobuf/field"
           + "_mask.proto\032\034google/protobuf/struct.prot"
           + "o\032\037google/protobuf/timestamp.proto\032\027goog"
-          + "le/rpc/status.proto\"\266\003\n\013Participant\022\021\n\004n"
+          + "le/rpc/status.proto\"\347\004\n\013Participant\022\021\n\004n"
           + "ame\030\001 \001(\tB\003\340A\001\022?\n\004role\030\002 \001(\0162,.google.cl"
           + "oud.dialogflow.v2.Participant.RoleB\003\340A\005\022"
-          + "&\n\031sip_recording_media_label\030\006 \001(\tB\003\340A\001\""
-          + "P\n\004Role\022\024\n\020ROLE_UNSPECIFIED\020\000\022\017\n\013HUMAN_A"
-          + "GENT\020\001\022\023\n\017AUTOMATED_AGENT\020\002\022\014\n\010END_USER\020"
-          + "\003:\330\001\352A\324\001\n%dialogflow.googleapis.com/Part"
-          + "icipant\022Jprojects/{project}/conversation"
-          + "s/{conversation}/participants/{participa"
-          + "nt}\022_projects/{project}/locations/{locat"
-          + "ion}/conversations/{conversation}/partic"
-          + "ipants/{participant}\"\375\003\n\007Message\022\014\n\004name"
-          + "\030\001 \001(\t\022\024\n\007content\030\002 \001(\tB\003\340A\002\022\032\n\rlanguage"
-          + "_code\030\003 \001(\tB\003\340A\001\022\030\n\013participant\030\004 \001(\tB\003\340"
-          + "A\003\022K\n\020participant_role\030\005 \001(\0162,.google.cl"
-          + "oud.dialogflow.v2.Participant.RoleB\003\340A\003\022"
-          + "4\n\013create_time\030\006 \001(\0132\032.google.protobuf.T"
-          + "imestampB\003\340A\003\022N\n\022message_annotation\030\007 \001("
-          + "\0132-.google.cloud.dialogflow.v2.MessageAn"
-          + "notationB\003\340A\003:\304\001\352A\300\001\n!dialogflow.googlea"
-          + "pis.com/Message\022Bprojects/{project}/conv"
-          + "ersations/{conversation}/messages/{messa"
-          + "ge}\022Wprojects/{project}/locations/{locat"
-          + "ion}/conversations/{conversation}/messag"
-          + "es/{message}\"\234\001\n\030CreateParticipantReques"
-          + "t\022=\n\006parent\030\001 \001(\tB-\340A\002\372A\'\022%dialogflow.go"
-          + "ogleapis.com/Participant\022A\n\013participant\030"
-          + "\002 \001(\0132\'.google.cloud.dialogflow.v2.Parti"
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-          + "2.Participant\"\315\001\202\323\344\223\002\254\0012@/v2/{participan"
-          + "t.name=projects/*/conversations/*/partic"
-          + "ipants/*}:\013participantZ[2L/v2/{participa"
-          + "nt.name=projects/*/locations/*/conversat"
-          + "ions/*/participants/*}:\013participant\332A\027pa"
-          + "rticipant,update_mask\022\340\002\n\016AnalyzeContent"
-          + "\0221.google.cloud.dialogflow.v2.AnalyzeCon"
-          + "tentRequest\0322.google.cloud.dialogflow.v2"
-          + ".AnalyzeContentResponse\"\346\001\202\323\344\223\002\254\001\"J/v2/{"
-          + "participant=projects/*/conversations/*/p"
-          + "articipants/*}:analyzeContent:\001*Z[\"V/v2/"
-          + "{participant=projects/*/locations/*/conv"
-          + "ersations/*/participants/*}:analyzeConte"
-          + "nt:\001*\332A\026participant,text_input\332A\027partici"
-          + "pant,event_input\022\311\002\n\017SuggestArticles\0222.g"
-          + "oogle.cloud.dialogflow.v2.SuggestArticle"
-          + "sRequest\0323.google.cloud.dialogflow.v2.Su"
-          + "ggestArticlesResponse\"\314\001\202\323\344\223\002\274\001\"R/v2/{pa"
-          + "rent=projects/*/conversations/*/particip"
-          + "ants/*}/suggestions:suggestArticles:\001*Zc"
-          + "\"^/v2/{parent=projects/*/locations/*/con"
-          + "versations/*/participants/*}/suggestions"
-          + ":suggestArticles:\001*\332A\006parent\022\323\002\n\021Suggest"
-          + "FaqAnswers\0224.google.cloud.dialogflow.v2."
-          + "SuggestFaqAnswersRequest\0325.google.cloud."
-          + "dialogflow.v2.SuggestFaqAnswersResponse\""
-          + "\320\001\202\323\344\223\002\300\001\"T/v2/{parent=projects/*/conver"
-          + "sations/*/participants/*}/suggestions:su"
-          + "ggestFaqAnswers:\001*Ze\"`/v2/{parent=projec"
-          + "ts/*/locations/*/conversations/*/partici"
-          + "pants/*}/suggestions:suggestFaqAnswers:\001"
-          + "*\332A\006parent\032x\312A\031dialogflow.googleapis.com"
-          + "\322AYhttps://www.googleapis.com/auth/cloud"
-          + "-platform,https://www.googleapis.com/aut"
-          + "h/dialogflowB\237\001\n\036com.google.cloud.dialog"
-          + "flow.v2B\020ParticipantProtoP\001ZDgoogle.gola"
-          + "ng.org/genproto/googleapis/cloud/dialogf"
-          + "low/v2;dialogflow\370\001\001\242\002\002DF\252\002\032Google.Cloud"
-          + ".Dialogflow.V2b\006proto3"
+          + "sponse\"\314\001\202\323\344\223\002\274\001\"R/v2/{parent=projects/*"
+          + "/conversations/*/participants/*}/suggest"
+          + "ions:suggestArticles:\001*Zc\"^/v2/{parent=p"
+          + "rojects/*/locations/*/conversations/*/pa"
+          + "rticipants/*}/suggestions:suggestArticle"
+          + "s:\001*\332A\006parent\022\323\002\n\021SuggestFaqAnswers\0224.go"
+          + "ogle.cloud.dialogflow.v2.SuggestFaqAnswe"
+          + "rsRequest\0325.google.cloud.dialogflow.v2.S"
+          + "uggestFaqAnswersResponse\"\320\001\202\323\344\223\002\300\001\"T/v2/"
+          + "{parent=projects/*/conversations/*/parti"
+          + "cipants/*}/suggestions:suggestFaqAnswers"
+          + ":\001*Ze\"`/v2/{parent=projects/*/locations/"
+          + "*/conversations/*/participants/*}/sugges"
+          + "tions:suggestFaqAnswers:\001*\332A\006parent\032x\312A\031"
+          + "dialogflow.googleapis.com\322AYhttps://www."
+          + "googleapis.com/auth/cloud-platform,https"
+          + "://www.googleapis.com/auth/dialogflowB\237\001"
+          + "\n\036com.google.cloud.dialogflow.v2B\020Partic"
+          + "ipantProtoP\001ZDgoogle.golang.org/genproto"
+          + "/googleapis/cloud/dialogflow/v2;dialogfl"
+          + "ow\370\001\001\242\002\002DF\252\002\032Google.Cloud.Dialogflow.V2b"
+          + "\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -339,7 +367,15 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_cloud_dialogflow_v2_Participant_descriptor,
             new java.lang.String[] {
-              "Name", "Role", "SipRecordingMediaLabel",
+              "Name", "Role", "SipRecordingMediaLabel", "DocumentsMetadataFilters",
+            });
+    internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_descriptor =
+        internal_static_google_cloud_dialogflow_v2_Participant_descriptor.getNestedTypes().get(0);
+    internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_dialogflow_v2_Participant_DocumentsMetadataFiltersEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
             });
     internal_static_google_cloud_dialogflow_v2_Message_descriptor =
         getDescriptor().getMessageTypes().get(1);
@@ -406,6 +442,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "EventInput",
               "ReplyAudioConfig",
               "QueryParams",
+              "AssistQueryParams",
               "RequestId",
               "Input",
             });
@@ -437,7 +474,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_cloud_dialogflow_v2_SuggestArticlesRequest_descriptor,
             new java.lang.String[] {
-              "Parent", "LatestMessage", "ContextSize",
+              "Parent", "LatestMessage", "ContextSize", "AssistQueryParams",
             });
     internal_static_google_cloud_dialogflow_v2_SuggestArticlesResponse_descriptor =
         getDescriptor().getMessageTypes().get(11);
@@ -453,7 +490,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_cloud_dialogflow_v2_SuggestFaqAnswersRequest_descriptor,
             new java.lang.String[] {
-              "Parent", "LatestMessage", "ContextSize",
+              "Parent", "LatestMessage", "ContextSize", "AssistQueryParams",
             });
     internal_static_google_cloud_dialogflow_v2_SuggestFaqAnswersResponse_descriptor =
         getDescriptor().getMessageTypes().get(13);
@@ -535,6 +572,24 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
             new java.lang.String[] {
               "Parts", "ContainEntities",
             });
+    internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor =
+        getDescriptor().getMessageTypes().get(21);
+    internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor,
+            new java.lang.String[] {
+              "DocumentsMetadataFilters",
+            });
+    internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_descriptor =
+        internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_descriptor
+            .getNestedTypes()
+            .get(0);
+    internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_dialogflow_v2_AssistQueryParameters_DocumentsMetadataFiltersEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
     com.google.protobuf.ExtensionRegistry registry =
         com.google.protobuf.ExtensionRegistry.newInstance();
     registry.add(com.google.api.ClientProto.defaultHost);
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequest.java
index deb94f9d3..b25938920 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+ * The request message for
+ * [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.SuggestArticlesRequest}
@@ -88,6 +89,23 @@ private SuggestArticlesRequest(
           case 24:
             {
               contextSize_ = input.readInt32();
+              break;
+            }
+          case 34:
+            {
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder subBuilder = null;
+              if (assistQueryParams_ != null) {
+                subBuilder = assistQueryParams_.toBuilder();
+              }
+              assistQueryParams_ =
+                  input.readMessage(
+                      com.google.cloud.dialogflow.v2.AssistQueryParameters.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(assistQueryParams_);
+                assistQueryParams_ = subBuilder.buildPartial();
+              }
+
               break;
             }
           default:
@@ -243,8 +261,9 @@ public com.google.protobuf.ByteString getLatestMessageBytes() {
    *
    * <pre>
    * Max number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-   * when compiling the suggestion. By default 20 and at most 50.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+   * to use as context when compiling the suggestion. By default 20 and at
+   * most 50.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
@@ -256,6 +275,55 @@ public int getContextSize() {
     return contextSize_;
   }
 
+  public static final int ASSIST_QUERY_PARAMS_FIELD_NUMBER = 4;
+  private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  @java.lang.Override
+  public boolean hasAssistQueryParams() {
+    return assistQueryParams_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+    return assistQueryParams_ == null
+        ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+        : assistQueryParams_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+      getAssistQueryParamsOrBuilder() {
+    return getAssistQueryParams();
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -279,6 +347,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (contextSize_ != 0) {
       output.writeInt32(3, contextSize_);
     }
+    if (assistQueryParams_ != null) {
+      output.writeMessage(4, getAssistQueryParams());
+    }
     unknownFields.writeTo(output);
   }
 
@@ -297,6 +368,9 @@ public int getSerializedSize() {
     if (contextSize_ != 0) {
       size += com.google.protobuf.CodedOutputStream.computeInt32Size(3, contextSize_);
     }
+    if (assistQueryParams_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getAssistQueryParams());
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -316,6 +390,10 @@ public boolean equals(final java.lang.Object obj) {
     if (!getParent().equals(other.getParent())) return false;
     if (!getLatestMessage().equals(other.getLatestMessage())) return false;
     if (getContextSize() != other.getContextSize()) return false;
+    if (hasAssistQueryParams() != other.hasAssistQueryParams()) return false;
+    if (hasAssistQueryParams()) {
+      if (!getAssistQueryParams().equals(other.getAssistQueryParams())) return false;
+    }
     if (!unknownFields.equals(other.unknownFields)) return false;
     return true;
   }
@@ -333,6 +411,10 @@ public int hashCode() {
     hash = (53 * hash) + getLatestMessage().hashCode();
     hash = (37 * hash) + CONTEXT_SIZE_FIELD_NUMBER;
     hash = (53 * hash) + getContextSize();
+    if (hasAssistQueryParams()) {
+      hash = (37 * hash) + ASSIST_QUERY_PARAMS_FIELD_NUMBER;
+      hash = (53 * hash) + getAssistQueryParams().hashCode();
+    }
     hash = (29 * hash) + unknownFields.hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -438,7 +520,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+   * The request message for
+   * [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.SuggestArticlesRequest}
@@ -485,6 +568,12 @@ public Builder clear() {
 
       contextSize_ = 0;
 
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
       return this;
     }
 
@@ -515,6 +604,11 @@ public com.google.cloud.dialogflow.v2.SuggestArticlesRequest buildPartial() {
       result.parent_ = parent_;
       result.latestMessage_ = latestMessage_;
       result.contextSize_ = contextSize_;
+      if (assistQueryParamsBuilder_ == null) {
+        result.assistQueryParams_ = assistQueryParams_;
+      } else {
+        result.assistQueryParams_ = assistQueryParamsBuilder_.build();
+      }
       onBuilt();
       return result;
     }
@@ -576,6 +670,9 @@ public Builder mergeFrom(com.google.cloud.dialogflow.v2.SuggestArticlesRequest o
       if (other.getContextSize() != 0) {
         setContextSize(other.getContextSize());
       }
+      if (other.hasAssistQueryParams()) {
+        mergeAssistQueryParams(other.getAssistQueryParams());
+      }
       this.mergeUnknownFields(other.unknownFields);
       onChanged();
       return this;
@@ -859,8 +956,9 @@ public Builder setLatestMessageBytes(com.google.protobuf.ByteString value) {
      *
      * <pre>
      * Max number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-     * when compiling the suggestion. By default 20 and at most 50.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+     * to use as context when compiling the suggestion. By default 20 and at
+     * most 50.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -876,8 +974,9 @@ public int getContextSize() {
      *
      * <pre>
      * Max number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-     * when compiling the suggestion. By default 20 and at most 50.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+     * to use as context when compiling the suggestion. By default 20 and at
+     * most 50.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -896,8 +995,9 @@ public Builder setContextSize(int value) {
      *
      * <pre>
      * Max number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-     * when compiling the suggestion. By default 20 and at most 50.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+     * to use as context when compiling the suggestion. By default 20 and at
+     * most 50.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -911,6 +1011,196 @@ public Builder clearContextSize() {
       return this;
     }
 
+    private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        assistQueryParamsBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     *
+     * @return Whether the assistQueryParams field is set.
+     */
+    public boolean hasAssistQueryParams() {
+      return assistQueryParamsBuilder_ != null || assistQueryParams_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     *
+     * @return The assistQueryParams.
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      } else {
+        return assistQueryParamsBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        assistQueryParams_ = value;
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder builderForValue) {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = builderForValue.build();
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder mergeAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (assistQueryParams_ != null) {
+          assistQueryParams_ =
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.newBuilder(assistQueryParams_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          assistQueryParams_ = value;
+        }
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder clearAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+        onChanged();
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder
+        getAssistQueryParamsBuilder() {
+
+      onChanged();
+      return getAssistQueryParamsFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+        getAssistQueryParamsOrBuilder() {
+      if (assistQueryParamsBuilder_ != null) {
+        return assistQueryParamsBuilder_.getMessageOrBuilder();
+      } else {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        getAssistQueryParamsFieldBuilder() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParamsBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.dialogflow.v2.AssistQueryParameters,
+                com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+                com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>(
+                getAssistQueryParams(), getParentForChildren(), isClean());
+        assistQueryParams_ = null;
+      }
+      return assistQueryParamsBuilder_;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequestOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequestOrBuilder.java
index ec4d994b0..2d0b151a0 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequestOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesRequestOrBuilder.java
@@ -92,8 +92,9 @@ public interface SuggestArticlesRequestOrBuilder
    *
    * <pre>
    * Max number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-   * when compiling the suggestion. By default 20 and at most 50.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+   * to use as context when compiling the suggestion. By default 20 and at
+   * most 50.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
@@ -101,4 +102,39 @@ public interface SuggestArticlesRequestOrBuilder
    * @return The contextSize.
    */
   int getContextSize();
+
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  boolean hasAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder getAssistQueryParamsOrBuilder();
 }
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponse.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponse.java
index 41741be66..e57a235e1 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponse.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponse.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The response message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+ * The response message for
+ * [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.SuggestArticlesResponse}
@@ -265,10 +266,11 @@ public com.google.protobuf.ByteString getLatestMessageBytes() {
    *
    * <pre>
    * Number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-   * suggestion. It may be smaller than the
-   * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-   * aren't that many messages in the conversation.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+   * to compile the suggestion. It may be smaller than the
+   * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+   * field in the request if there aren't that many messages in the
+   * conversation.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
@@ -464,7 +466,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The response message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+   * The response message for
+   * [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.SuggestArticlesResponse}
@@ -1158,10 +1161,11 @@ public Builder setLatestMessageBytes(com.google.protobuf.ByteString value) {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -1177,10 +1181,11 @@ public int getContextSize() {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -1199,10 +1204,11 @@ public Builder setContextSize(int value) {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponseOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponseOrBuilder.java
index 7e75f0e72..4c87d2897 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponseOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestArticlesResponseOrBuilder.java
@@ -111,10 +111,11 @@ public interface SuggestArticlesResponseOrBuilder
    *
    * <pre>
    * Number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-   * suggestion. It may be smaller than the
-   * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-   * aren't that many messages in the conversation.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+   * to compile the suggestion. It may be smaller than the
+   * [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+   * field in the request if there aren't that many messages in the
+   * conversation.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequest.java
index c523dd4ca..020472089 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+ * The request message for
+ * [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.SuggestFaqAnswersRequest}
@@ -88,6 +89,23 @@ private SuggestFaqAnswersRequest(
           case 24:
             {
               contextSize_ = input.readInt32();
+              break;
+            }
+          case 34:
+            {
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder subBuilder = null;
+              if (assistQueryParams_ != null) {
+                subBuilder = assistQueryParams_.toBuilder();
+              }
+              assistQueryParams_ =
+                  input.readMessage(
+                      com.google.cloud.dialogflow.v2.AssistQueryParameters.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(assistQueryParams_);
+                assistQueryParams_ = subBuilder.buildPartial();
+              }
+
               break;
             }
           default:
@@ -256,6 +274,55 @@ public int getContextSize() {
     return contextSize_;
   }
 
+  public static final int ASSIST_QUERY_PARAMS_FIELD_NUMBER = 4;
+  private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  @java.lang.Override
+  public boolean hasAssistQueryParams() {
+    return assistQueryParams_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+    return assistQueryParams_ == null
+        ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+        : assistQueryParams_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+      getAssistQueryParamsOrBuilder() {
+    return getAssistQueryParams();
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -279,6 +346,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (contextSize_ != 0) {
       output.writeInt32(3, contextSize_);
     }
+    if (assistQueryParams_ != null) {
+      output.writeMessage(4, getAssistQueryParams());
+    }
     unknownFields.writeTo(output);
   }
 
@@ -297,6 +367,9 @@ public int getSerializedSize() {
     if (contextSize_ != 0) {
       size += com.google.protobuf.CodedOutputStream.computeInt32Size(3, contextSize_);
     }
+    if (assistQueryParams_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getAssistQueryParams());
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -316,6 +389,10 @@ public boolean equals(final java.lang.Object obj) {
     if (!getParent().equals(other.getParent())) return false;
     if (!getLatestMessage().equals(other.getLatestMessage())) return false;
     if (getContextSize() != other.getContextSize()) return false;
+    if (hasAssistQueryParams() != other.hasAssistQueryParams()) return false;
+    if (hasAssistQueryParams()) {
+      if (!getAssistQueryParams().equals(other.getAssistQueryParams())) return false;
+    }
     if (!unknownFields.equals(other.unknownFields)) return false;
     return true;
   }
@@ -333,6 +410,10 @@ public int hashCode() {
     hash = (53 * hash) + getLatestMessage().hashCode();
     hash = (37 * hash) + CONTEXT_SIZE_FIELD_NUMBER;
     hash = (53 * hash) + getContextSize();
+    if (hasAssistQueryParams()) {
+      hash = (37 * hash) + ASSIST_QUERY_PARAMS_FIELD_NUMBER;
+      hash = (53 * hash) + getAssistQueryParams().hashCode();
+    }
     hash = (29 * hash) + unknownFields.hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -438,7 +519,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+   * The request message for
+   * [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.SuggestFaqAnswersRequest}
@@ -485,6 +567,12 @@ public Builder clear() {
 
       contextSize_ = 0;
 
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
       return this;
     }
 
@@ -515,6 +603,11 @@ public com.google.cloud.dialogflow.v2.SuggestFaqAnswersRequest buildPartial() {
       result.parent_ = parent_;
       result.latestMessage_ = latestMessage_;
       result.contextSize_ = contextSize_;
+      if (assistQueryParamsBuilder_ == null) {
+        result.assistQueryParams_ = assistQueryParams_;
+      } else {
+        result.assistQueryParams_ = assistQueryParamsBuilder_.build();
+      }
       onBuilt();
       return result;
     }
@@ -576,6 +669,9 @@ public Builder mergeFrom(com.google.cloud.dialogflow.v2.SuggestFaqAnswersRequest
       if (other.getContextSize() != 0) {
         setContextSize(other.getContextSize());
       }
+      if (other.hasAssistQueryParams()) {
+        mergeAssistQueryParams(other.getAssistQueryParams());
+      }
       this.mergeUnknownFields(other.unknownFields);
       onChanged();
       return this;
@@ -911,6 +1007,196 @@ public Builder clearContextSize() {
       return this;
     }
 
+    private com.google.cloud.dialogflow.v2.AssistQueryParameters assistQueryParams_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        assistQueryParamsBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     *
+     * @return Whether the assistQueryParams field is set.
+     */
+    public boolean hasAssistQueryParams() {
+      return assistQueryParamsBuilder_ != null || assistQueryParams_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     *
+     * @return The assistQueryParams.
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      } else {
+        return assistQueryParamsBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        assistQueryParams_ = value;
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder setAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder builderForValue) {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = builderForValue.build();
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder mergeAssistQueryParams(
+        com.google.cloud.dialogflow.v2.AssistQueryParameters value) {
+      if (assistQueryParamsBuilder_ == null) {
+        if (assistQueryParams_ != null) {
+          assistQueryParams_ =
+              com.google.cloud.dialogflow.v2.AssistQueryParameters.newBuilder(assistQueryParams_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          assistQueryParams_ = value;
+        }
+        onChanged();
+      } else {
+        assistQueryParamsBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public Builder clearAssistQueryParams() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParams_ = null;
+        onChanged();
+      } else {
+        assistQueryParams_ = null;
+        assistQueryParamsBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder
+        getAssistQueryParamsBuilder() {
+
+      onChanged();
+      return getAssistQueryParamsFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    public com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder
+        getAssistQueryParamsOrBuilder() {
+      if (assistQueryParamsBuilder_ != null) {
+        return assistQueryParamsBuilder_.getMessageOrBuilder();
+      } else {
+        return assistQueryParams_ == null
+            ? com.google.cloud.dialogflow.v2.AssistQueryParameters.getDefaultInstance()
+            : assistQueryParams_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Parameters for a human assist query.
+     * </pre>
+     *
+     * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.dialogflow.v2.AssistQueryParameters,
+            com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+            com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>
+        getAssistQueryParamsFieldBuilder() {
+      if (assistQueryParamsBuilder_ == null) {
+        assistQueryParamsBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.dialogflow.v2.AssistQueryParameters,
+                com.google.cloud.dialogflow.v2.AssistQueryParameters.Builder,
+                com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder>(
+                getAssistQueryParams(), getParentForChildren(), isClean());
+        assistQueryParams_ = null;
+      }
+      return assistQueryParamsBuilder_;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequestOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequestOrBuilder.java
index 54eec0cc7..5e860c10b 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequestOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersRequestOrBuilder.java
@@ -101,4 +101,39 @@ public interface SuggestFaqAnswersRequestOrBuilder
    * @return The contextSize.
    */
   int getContextSize();
+
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return Whether the assistQueryParams field is set.
+   */
+  boolean hasAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   *
+   * @return The assistQueryParams.
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParameters getAssistQueryParams();
+  /**
+   *
+   *
+   * <pre>
+   * Parameters for a human assist query.
+   * </pre>
+   *
+   * <code>.google.cloud.dialogflow.v2.AssistQueryParameters assist_query_params = 4;</code>
+   */
+  com.google.cloud.dialogflow.v2.AssistQueryParametersOrBuilder getAssistQueryParamsOrBuilder();
 }
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponse.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponse.java
index 6ace67285..3195ce8cc 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponse.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponse.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+ * The request message for
+ * [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.SuggestFaqAnswersResponse}
@@ -263,10 +264,11 @@ public com.google.protobuf.ByteString getLatestMessageBytes() {
    *
    * <pre>
    * Number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-   * suggestion. It may be smaller than the
-   * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-   * aren't that many messages in the conversation.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+   * to compile the suggestion. It may be smaller than the
+   * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+   * field in the request if there aren't that many messages in the
+   * conversation.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
@@ -462,7 +464,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+   * The request message for
+   * [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.SuggestFaqAnswersResponse}
@@ -1147,10 +1150,11 @@ public Builder setLatestMessageBytes(com.google.protobuf.ByteString value) {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -1166,10 +1170,11 @@ public int getContextSize() {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
@@ -1188,10 +1193,11 @@ public Builder setContextSize(int value) {
      *
      * <pre>
      * Number of messages prior to and including
-     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-     * suggestion. It may be smaller than the
-     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-     * aren't that many messages in the conversation.
+     * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+     * to compile the suggestion. It may be smaller than the
+     * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+     * field in the request if there aren't that many messages in the
+     * conversation.
      * </pre>
      *
      * <code>int32 context_size = 3;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponseOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponseOrBuilder.java
index ffc55e1d8..ac0087f7e 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponseOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestFaqAnswersResponseOrBuilder.java
@@ -111,10 +111,11 @@ public interface SuggestFaqAnswersResponseOrBuilder
    *
    * <pre>
    * Number of messages prior to and including
-   * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-   * suggestion. It may be smaller than the
-   * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-   * aren't that many messages in the conversation.
+   * [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+   * to compile the suggestion. It may be smaller than the
+   * [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+   * field in the request if there aren't that many messages in the
+   * conversation.
    * </pre>
    *
    * <code>int32 context_size = 3;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionFeature.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionFeature.java
index f7bd6564f..e647fc3b8 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionFeature.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionFeature.java
@@ -153,6 +153,16 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
      * <code>FAQ = 2;</code>
      */
     FAQ(2),
+    /**
+     *
+     *
+     * <pre>
+     * Run smart reply model.
+     * </pre>
+     *
+     * <code>SMART_REPLY = 3;</code>
+     */
+    SMART_REPLY(3),
     UNRECOGNIZED(-1),
     ;
 
@@ -186,6 +196,16 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
      * <code>FAQ = 2;</code>
      */
     public static final int FAQ_VALUE = 2;
+    /**
+     *
+     *
+     * <pre>
+     * Run smart reply model.
+     * </pre>
+     *
+     * <code>SMART_REPLY = 3;</code>
+     */
+    public static final int SMART_REPLY_VALUE = 3;
 
     public final int getNumber() {
       if (this == UNRECOGNIZED) {
@@ -217,6 +237,8 @@ public static Type forNumber(int value) {
           return ARTICLE_SUGGESTION;
         case 2:
           return FAQ;
+        case 3:
+          return SMART_REPLY;
         default:
           return null;
       }
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionResult.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionResult.java
index cc5b54e5f..60d12cb4c 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionResult.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/SuggestionResult.java
@@ -23,8 +23,12 @@
  *
  * <pre>
  * One response of different type of suggestion response which is used in
- * the response of [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
- * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent], as well as [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
+ * the response of
+ * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent]
+ * and
+ * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent],
+ * as well as
+ * [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.SuggestionResult}
@@ -579,8 +583,12 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    * <pre>
    * One response of different type of suggestion response which is used in
-   * the response of [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
-   * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent], as well as [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
+   * the response of
+   * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent]
+   * and
+   * [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent],
+   * as well as
+   * [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.SuggestionResult}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/UpdateParticipantRequest.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/UpdateParticipantRequest.java
index b6774744d..3422e12eb 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/UpdateParticipantRequest.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/UpdateParticipantRequest.java
@@ -22,7 +22,8 @@
  *
  *
  * <pre>
- * The request message for [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
+ * The request message for
+ * [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
  * </pre>
  *
  * Protobuf type {@code google.cloud.dialogflow.v2.UpdateParticipantRequest}
@@ -419,7 +420,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * The request message for [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
+   * The request message for
+   * [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
    * </pre>
    *
    * Protobuf type {@code google.cloud.dialogflow.v2.UpdateParticipantRequest}
diff --git a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/audio_config.proto b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/audio_config.proto
index b27e86104..232b222a4 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/audio_config.proto
+++ b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/audio_config.proto
@@ -30,6 +30,36 @@ option java_outer_classname = "AudioConfigProto";
 option java_package = "com.google.cloud.dialogflow.v2";
 option objc_class_prefix = "DF";
 
+// Hints for the speech recognizer to help with recognition in a specific
+// conversation state.
+message SpeechContext {
+  // Optional. A list of strings containing words and phrases that the speech
+  // recognizer should recognize with higher likelihood.
+  //
+  // This list can be used to:
+  //
+  // * improve accuracy for words and phrases you expect the user to say,
+  //   e.g. typical commands for your Dialogflow agent
+  // * add additional words to the speech recognizer vocabulary
+  // * ...
+  //
+  // See the [Cloud Speech
+  // documentation](https://cloud.google.com/speech-to-text/quotas) for usage
+  // limits.
+  repeated string phrases = 1;
+
+  // Optional. Boost for this context compared to other contexts:
+  //
+  // * If the boost is positive, Dialogflow will increase the probability that
+  //   the phrases in this context are recognized over similar sounding phrases.
+  // * If the boost is unspecified or non-positive, Dialogflow will not apply
+  //   any boost.
+  //
+  // Dialogflow recommends that you use boosts in the range (0, 20] and that you
+  // find a value that fits your use case with binary search.
+  float boost = 2;
+}
+
 // Audio encoding of the audio content sent in the conversational query request.
 // Refer to the
 // [Cloud Speech API
@@ -79,36 +109,6 @@ enum AudioEncoding {
   AUDIO_ENCODING_SPEEX_WITH_HEADER_BYTE = 7;
 }
 
-// Hints for the speech recognizer to help with recognition in a specific
-// conversation state.
-message SpeechContext {
-  // Optional. A list of strings containing words and phrases that the speech
-  // recognizer should recognize with higher likelihood.
-  //
-  // This list can be used to:
-  //
-  // * improve accuracy for words and phrases you expect the user to say,
-  //   e.g. typical commands for your Dialogflow agent
-  // * add additional words to the speech recognizer vocabulary
-  // * ...
-  //
-  // See the [Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/quotas) for usage
-  // limits.
-  repeated string phrases = 1;
-
-  // Optional. Boost for this context compared to other contexts:
-  //
-  // * If the boost is positive, Dialogflow will increase the probability that
-  //   the phrases in this context are recognized over similar sounding phrases.
-  // * If the boost is unspecified or non-positive, Dialogflow will not apply
-  //   any boost.
-  //
-  // Dialogflow recommends that you use boosts in the range (0, 20] and that you
-  // find a value that fits your use case with binary search.
-  float boost = 2;
-}
-
 // Information for a word recognized by the speech recognizer.
 message SpeechWordInfo {
   // The word this info is for.
diff --git a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/conversation_profile.proto b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/conversation_profile.proto
index 38563059f..8eab78fb5 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/conversation_profile.proto
+++ b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/conversation_profile.proto
@@ -606,6 +606,9 @@ message SuggestionFeature {
 
     // Run FAQ model.
     FAQ = 2;
+
+    // Run smart reply model.
+    SMART_REPLY = 3;
   }
 
   // Type of Human Agent Assistant API feature to request.
diff --git a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/participant.proto b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/participant.proto
index f815d8196..390eff7ba 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/participant.proto
+++ b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/participant.proto
@@ -69,7 +69,8 @@ service Participants {
   }
 
   // Returns the list of all participants in the specified conversation.
-  rpc ListParticipants(ListParticipantsRequest) returns (ListParticipantsResponse) {
+  rpc ListParticipants(ListParticipantsRequest)
+      returns (ListParticipantsResponse) {
     option (google.api.http) = {
       get: "/v2/{parent=projects/*/conversations/*}/participants"
       additional_bindings {
@@ -113,7 +114,8 @@ service Participants {
 
   // Gets suggested articles for a participant based on specific historical
   // messages.
-  rpc SuggestArticles(SuggestArticlesRequest) returns (SuggestArticlesResponse) {
+  rpc SuggestArticles(SuggestArticlesRequest)
+      returns (SuggestArticlesResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestArticles"
       body: "*"
@@ -127,7 +129,8 @@ service Participants {
 
   // Gets suggested faq answers for a participant based on specific historical
   // messages.
-  rpc SuggestFaqAnswers(SuggestFaqAnswersRequest) returns (SuggestFaqAnswersResponse) {
+  rpc SuggestFaqAnswers(SuggestFaqAnswersRequest)
+      returns (SuggestFaqAnswersResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestFaqAnswers"
       body: "*"
@@ -169,14 +172,34 @@ message Participant {
   // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
   string name = 1 [(google.api.field_behavior) = OPTIONAL];
 
-  // Immutable. The role this participant plays in the conversation. This field must be set
-  // during participant creation and is then immutable.
+  // Immutable. The role this participant plays in the conversation. This field
+  // must be set during participant creation and is then immutable.
   Role role = 2 [(google.api.field_behavior) = IMMUTABLE];
 
   // Optional. Label applied to streams representing this participant in SIPREC
   // XML metadata and SDP. This is used to assign transcriptions from that
   // media stream to this participant. This field can be updated.
   string sip_recording_media_label = 6 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Key-value filters on the metadata of documents returned by
+  // article suggestion. If specified, article suggestion only returns suggested
+  // documents that match all filters in their
+  // [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+  // values for a metadata key should be concatenated by comma. For example,
+  // filters to match all documents that have 'US' or 'CA' in their market
+  // metadata values and 'agent' in their user metadata values will be
+  // ```
+  // documents_metadata_filters {
+  //   key: "market"
+  //   value: "US,CA"
+  // }
+  // documents_metadata_filters {
+  //   key: "user"
+  //   value: "agent"
+  // }
+  // ```
+  map<string, string> documents_metadata_filters = 8
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Represents a message posted into a conversation.
@@ -204,16 +227,20 @@ message Message {
   string participant = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // Output only. The role of the participant.
-  Participant.Role participant_role = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
+  Participant.Role participant_role = 5
+      [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // Output only. The time when the message was created.
-  google.protobuf.Timestamp create_time = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
+  google.protobuf.Timestamp create_time = 6
+      [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // Output only. The annotation for the message.
-  MessageAnnotation message_annotation = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
+  MessageAnnotation message_annotation = 7
+      [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
-// The request message for [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
+// The request message for
+// [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
 message CreateParticipantRequest {
   // Required. Resource identifier of the conversation adding the participant.
   // Format: `projects/<Project ID>/locations/<Location
@@ -229,7 +256,8 @@ message CreateParticipantRequest {
   Participant participant = 2 [(google.api.field_behavior) = REQUIRED];
 }
 
-// The request message for [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
+// The request message for
+// [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
 message GetParticipantRequest {
   // Required. The name of the participant. Format:
   // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
@@ -242,7 +270,8 @@ message GetParticipantRequest {
   ];
 }
 
-// The request message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+// The request message for
+// [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
 message ListParticipantsRequest {
   // Required. The conversation to list all participants from.
   // Format: `projects/<Project ID>/locations/<Location
@@ -262,7 +291,8 @@ message ListParticipantsRequest {
   string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
 }
 
-// The response message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
+// The response message for
+// [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
 message ListParticipantsResponse {
   // The list of participants. There is a maximum number of items
   // returned based on the page_size field in the request.
@@ -273,16 +303,19 @@ message ListParticipantsResponse {
   string next_page_token = 2;
 }
 
-// The request message for [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
+// The request message for
+// [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
 message UpdateParticipantRequest {
   // Required. The participant to update.
   Participant participant = 1 [(google.api.field_behavior) = REQUIRED];
 
   // Required. The mask to specify which fields to update.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
+  google.protobuf.FieldMask update_mask = 2
+      [(google.api.field_behavior) = REQUIRED];
 }
 
-// The request message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+// The request message for
+// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
 message AnalyzeContentRequest {
   // Required. The name of the participant this text comes from.
   // Format: `projects/<Project ID>/locations/<Location
@@ -313,6 +346,9 @@ message AnalyzeContentRequest {
   // Parameters for a Dialogflow virtual-agent query.
   QueryParameters query_params = 9;
 
+  // Parameters for a human assist query.
+  AssistQueryParameters assist_query_params = 14;
+
   // A unique identifier for this request. Restricted to 36 ASCII characters.
   // A random UUID is recommended.
   // This request is only idempotent if a `request_id` is provided.
@@ -325,7 +361,8 @@ message DtmfParameters {
   bool accepts_dtmf_input = 1;
 }
 
-// The response message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
+// The response message for
+// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
 message AnalyzeContentResponse {
   // The output text content.
   // This field is set if the automated agent responded with text to show to
@@ -348,19 +385,23 @@ message AnalyzeContentResponse {
   // Only set if a Dialogflow automated agent has responded.
   // Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
   // and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-  // are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
+  // are always empty, use
+  // [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio]
+  // instead.
   AutomatedAgentReply automated_agent_reply = 3;
 
   // Message analyzed by CCAI.
   Message message = 5;
 
   // The suggestions for most recent human agent. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+  // of
   // [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
   repeated SuggestionResult human_agent_suggestion_results = 6;
 
   // The suggestions for end user. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
+  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
+  // of
   // [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
   repeated SuggestionResult end_user_suggestion_results = 7;
 
@@ -368,7 +409,8 @@ message AnalyzeContentResponse {
   DtmfParameters dtmf_parameters = 9;
 }
 
-// The request message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+// The request message for
+// [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
 message SuggestArticlesRequest {
   // Required. The name of the participant to fetch suggestion for.
   // Format: `projects/<Project ID>/locations/<Location
@@ -386,16 +428,21 @@ message SuggestArticlesRequest {
   // Format: `projects/<Project ID>/locations/<Location
   // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
   string latest_message = 2 [(google.api.resource_reference) = {
-                               type: "dialogflow.googleapis.com/Message"
-                             }];
+    type: "dialogflow.googleapis.com/Message"
+  }];
 
   // Max number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-  // when compiling the suggestion. By default 20 and at most 50.
+  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message]
+  // to use as context when compiling the suggestion. By default 20 and at
+  // most 50.
   int32 context_size = 3;
+
+  // Parameters for a human assist query.
+  AssistQueryParameters assist_query_params = 4;
 }
 
-// The response message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
+// The response message for
+// [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
 message SuggestArticlesResponse {
   // Articles ordered by score in descending order.
   repeated ArticleAnswer article_answers = 1;
@@ -408,14 +455,16 @@ message SuggestArticlesResponse {
   string latest_message = 2;
 
   // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
+  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message]
+  // to compile the suggestion. It may be smaller than the
+  // [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size]
+  // field in the request if there aren't that many messages in the
+  // conversation.
   int32 context_size = 3;
 }
 
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+// The request message for
+// [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
 message SuggestFaqAnswersRequest {
   // Required. The name of the participant to fetch suggestion for.
   // Format: `projects/<Project ID>/locations/<Location
@@ -433,16 +482,20 @@ message SuggestFaqAnswersRequest {
   // Format: `projects/<Project ID>/locations/<Location
   // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
   string latest_message = 2 [(google.api.resource_reference) = {
-                               type: "dialogflow.googleapis.com/Message"
-                             }];
+    type: "dialogflow.googleapis.com/Message"
+  }];
 
   // Max number of messages prior to and including
   // [latest_message] to use as context when compiling the
   // suggestion. By default 20 and at most 50.
   int32 context_size = 3;
+
+  // Parameters for a human assist query.
+  AssistQueryParameters assist_query_params = 4;
 }
 
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
+// The request message for
+// [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
 message SuggestFaqAnswersResponse {
   // Answers extracted from FAQ documents.
   repeated FaqAnswer faq_answers = 1;
@@ -455,10 +508,11 @@ message SuggestFaqAnswersResponse {
   string latest_message = 2;
 
   // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
+  // [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message]
+  // to compile the suggestion. It may be smaller than the
+  // [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size]
+  // field in the request if there aren't that many messages in the
+  // conversation.
   int32 context_size = 3;
 }
 
@@ -488,7 +542,9 @@ message AutomatedAgentReply {
     FINAL = 2;
   }
 
-  // Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
+  // Response of the Dialogflow
+  // [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent]
+  // call.
   DetectIntentResponse detect_intent_response = 1;
 
   // AutomatedAgentReply type.
@@ -557,8 +613,12 @@ message FaqAnswer {
 }
 
 // One response of different type of suggestion response which is used in
-// the response of [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
-// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent], as well as [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
+// the response of
+// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent]
+// and
+// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent],
+// as well as
+// [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
 message SuggestionResult {
   // Different type of suggestion response.
   oneof suggestion_response {
@@ -609,3 +669,23 @@ message MessageAnnotation {
   // Indicates whether the text message contains entities.
   bool contain_entities = 2;
 }
+
+// Represents the parameters of human assist query.
+message AssistQueryParameters {
+  // Key-value filters on the metadata of documents returned by article
+  // suggestion. If specified, article suggestion only returns suggested
+  // documents that match all filters in their
+  // [Document.metadata][google.cloud.dialogflow.v2.Document.metadata]. Multiple
+  // values for a metadata key should be concatenated by comma. For example,
+  // filters to match all documents that have 'US' or 'CA' in their market
+  // metadata values and 'agent' in their user metadata values will be
+  // documents_metadata_filters {
+  //   key: "market"
+  //   value: "US,CA"
+  // }
+  // documents_metadata_filters {
+  //   key: "user"
+  //   value: "agent"
+  // }
+  map<string, string> documents_metadata_filters = 1;
+}