title: Dialogflow V2 Messenger Integration with Multiple Messages
body: <p>I am trying to send to multiple messages within one Webhook call to Dialogflow, which shall be passed to Messenger. Right now my Webhook responds with a malfunctioning JSON body: </p>
  
  <pre><code>{
      'fulfillmentText': "Text",
      'fulfillmentMessages': [{
          "platform": "facebook",
          "text": [{
              "text": "Text"
          }]
      }],
      'source': "facebook"
  }
  </code></pre>
  
  <p>When I test the Webhook via Messenger I see the <em>is typing</em> symbol, but never receive the <em>Text</em> message. While testing the same Webhook from the Dialogflow Console I get </p>
  
  <blockquote>
    <p>Webhook execution successful</p>
  </blockquote>
  
  <p>returned. I guess I am missing some JSON fields to tell Dialogflow in which format it has to send the JSON two the Messenger API. Anybody having any clues on how to solve this issue?</p>
  
  <hr>
  
  <p><strong>Edit:</strong>
  My latest not working trial...</p>
  
  <pre><code>{
    "fulfillmentText": "Hola!",
    "fulfillmentMessages": [
      {
        "text": {
          "text": [
            "Title: this is a title"
          ]
        },
        "platform": "FACEBOOK"
      },
      {
        "text": {
          "text": [
            "Title: this is a title"
          ]
        },
        "platform": "FACEBOOK"
      }
    ]
  }
  </code></pre>