diff --git a/metadata/V2/AnswerRecord.php b/metadata/V2/AnswerRecord.php
index c86fc73..7fc56b2 100644
Binary files a/metadata/V2/AnswerRecord.php and b/metadata/V2/AnswerRecord.php differ
diff --git a/metadata/V2/AudioConfig.php b/metadata/V2/AudioConfig.php
index a7bfc1e..97f225d 100644
Binary files a/metadata/V2/AudioConfig.php and b/metadata/V2/AudioConfig.php differ
diff --git a/src/V2/AgentAssistantFeedback/SummarizationFeedback.php b/src/V2/AgentAssistantFeedback/SummarizationFeedback.php
index 535a439..f6729e6 100644
--- a/src/V2/AgentAssistantFeedback/SummarizationFeedback.php
+++ b/src/V2/AgentAssistantFeedback/SummarizationFeedback.php
@@ -33,6 +33,12 @@ class SummarizationFeedback extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>string summary_text = 3;</code>
      */
     private $summary_text = '';
+    /**
+     * Optional. Actual text sections of submitted summary.
+     *
+     * Generated from protobuf field <code>map<string, string> text_sections = 4 [(.google.api.field_behavior) = OPTIONAL];</code>
+     */
+    private $text_sections;
 
     /**
      * Constructor.
@@ -46,6 +52,8 @@ class SummarizationFeedback extends \Google\Protobuf\Internal\Message
      *           Timestamp when the summary was submitted.
      *     @type string $summary_text
      *           Text of actual submitted summary.
+     *     @type array|\Google\Protobuf\Internal\MapField $text_sections
+     *           Optional. Actual text sections of submitted summary.
      * }
      */
     public function __construct($data = NULL) {
@@ -151,6 +159,32 @@ public function setSummaryText($var)
         return $this;
     }
 
+    /**
+     * Optional. Actual text sections of submitted summary.
+     *
+     * Generated from protobuf field <code>map<string, string> text_sections = 4 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return \Google\Protobuf\Internal\MapField
+     */
+    public function getTextSections()
+    {
+        return $this->text_sections;
+    }
+
+    /**
+     * Optional. Actual text sections of submitted summary.
+     *
+     * Generated from protobuf field <code>map<string, string> text_sections = 4 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param array|\Google\Protobuf\Internal\MapField $var
+     * @return $this
+     */
+    public function setTextSections($var)
+    {
+        $arr = GPBUtil::checkMapField($var, \Google\Protobuf\Internal\GPBType::STRING, \Google\Protobuf\Internal\GPBType::STRING);
+        $this->text_sections = $arr;
+
+        return $this;
+    }
+
 }
 
 
diff --git a/src/V2/InputAudioConfig.php b/src/V2/InputAudioConfig.php
index b89abfc..b0f64e5 100644
--- a/src/V2/InputAudioConfig.php
+++ b/src/V2/InputAudioConfig.php
@@ -121,6 +121,15 @@ class InputAudioConfig extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>bool enable_automatic_punctuation = 17;</code>
      */
     private $enable_automatic_punctuation = false;
+    /**
+     * If `true`, the request will opt out for STT conformer model migration.
+     * This field will be deprecated once force migration takes place in June
+     * 2024. Please refer to [Dialogflow ES Speech model
+     * migration](https://cloud.google.com/dialogflow/es/docs/speech-model-migration).
+     *
+     * Generated from protobuf field <code>bool opt_out_conformer_model_migration = 26;</code>
+     */
+    private $opt_out_conformer_model_migration = false;
 
     /**
      * Constructor.
@@ -189,6 +198,11 @@ class InputAudioConfig extends \Google\Protobuf\Internal\Message
      *           `NO_SPEECH_RECOGNIZED` event to Dialogflow agent.
      *     @type bool $enable_automatic_punctuation
      *           Enable automatic punctuation option at the speech backend.
+     *     @type bool $opt_out_conformer_model_migration
+     *           If `true`, the request will opt out for STT conformer model migration.
+     *           This field will be deprecated once force migration takes place in June
+     *           2024. Please refer to [Dialogflow ES Speech model
+     *           migration](https://cloud.google.com/dialogflow/es/docs/speech-model-migration).
      * }
      */
     public function __construct($data = NULL) {
@@ -564,5 +578,37 @@ public function setEnableAutomaticPunctuation($var)
         return $this;
     }
 
+    /**
+     * If `true`, the request will opt out for STT conformer model migration.
+     * This field will be deprecated once force migration takes place in June
+     * 2024. Please refer to [Dialogflow ES Speech model
+     * migration](https://cloud.google.com/dialogflow/es/docs/speech-model-migration).
+     *
+     * Generated from protobuf field <code>bool opt_out_conformer_model_migration = 26;</code>
+     * @return bool
+     */
+    public function getOptOutConformerModelMigration()
+    {
+        return $this->opt_out_conformer_model_migration;
+    }
+
+    /**
+     * If `true`, the request will opt out for STT conformer model migration.
+     * This field will be deprecated once force migration takes place in June
+     * 2024. Please refer to [Dialogflow ES Speech model
+     * migration](https://cloud.google.com/dialogflow/es/docs/speech-model-migration).
+     *
+     * Generated from protobuf field <code>bool opt_out_conformer_model_migration = 26;</code>
+     * @param bool $var
+     * @return $this
+     */
+    public function setOptOutConformerModelMigration($var)
+    {
+        GPBUtil::checkBool($var);
+        $this->opt_out_conformer_model_migration = $var;
+
+        return $this;
+    }
+
 }
 
diff --git a/src/V2/StreamingRecognitionResult/MessageType.php b/src/V2/StreamingRecognitionResult/MessageType.php
index ed0c839..67985a3 100644
--- a/src/V2/StreamingRecognitionResult/MessageType.php
+++ b/src/V2/StreamingRecognitionResult/MessageType.php
@@ -26,8 +26,8 @@ class MessageType
      */
     const TRANSCRIPT = 1;
     /**
-     * Event indicates that the server has detected the end of the user's speech
-     * utterance and expects no additional inputs.
+     * This event indicates that the server has detected the end of the user's
+     * speech utterance and expects no additional inputs.
      * Therefore, the server will not process additional audio (although it may
      * subsequently return additional results). The client should stop sending
      * additional audio data, half-close the gRPC connection, and wait for any