title: Trigger intent after bot response
body: <p>The dialogflow fulfillment code sample can return response in intent as follow.</p>
  
  <pre><code>function welcome(agent) {
    agent.add(`Welcome to agent!`);
  }
  </code></pre>
  
  <p>Suppose that I want to trigger another intent name "faq" right after that <strong>without any user input</strong>. How can it be done? I am expecting something as follow but could not find any documentation.</p>
  
  <pre><code>function welcome(agent) {
    agent.add(`Welcome to agent!`);
    agent.triggerIntent('faq');
  }
  </code></pre>
  
  <p>I look at the <a href="https://cloud.google.com/dialogflow/docs/events-custom" rel="nofollow noreferrer">custom event documentation</a> but still unable get the idea to implement it.</p>
  
  <p><strong>Conversation sample:</strong><br></p>
  
  <pre><code>User A: Hi
  Bot: Welcome to agent!
  Bot: Please pick FAQ to see detail:
  1) FAQ 1
  2) FAQ 2
  3) FAQ 3
  User: Show FAQ
  Bot: Please pick FAQ to see detail:
  1) FAQ 1
  2) FAQ 2
  3) FAQ 3
  </code></pre>