title: Changing Twiml instruction during the Twilio call
body: <p>I am working an a Twilio app, and now building a feature to change Twiml instruction during the call.</p>
  
  <p>So below will be a use case for it.</p>
  
  <ol>
  <li>A user calls to a specific number for example 123-456-7890</li>
  <li>When 123-456-7890 receives and answers the call, it should play some musics.</li>
  <li>In a dashboard, I, an agent, should be able to change the music playing with other message instruction by clicking a button.</li>
  <li>The replaced message should play until the call ends.</li>
  </ol>
  
  <p>I tried to figure out a way to build this feature, but I wonder if it is technically possible or not. Thank you for reading my question. It will be really nice if any of you can give me some comments or feedbacks.</p>
  
  <p>Thanks</p>