title: Amazon Alexa dynamic variables for intent
body: <p>I am trying to build an Alexa Skills Kit, where a user can invoke an intent by saying something like</p>
  
  <p><code>GetFriendLocation where is {Friend}</code></p>
  
  <p>and for Alexa to recognize the variable friend I have to define all the possible values in <code>LIST_OF_Friends</code> file. But what if I do not know all the values for <code>Friend</code> and still would like to make a best match for ones present in some service that my app has access to.</p>