title: Microsoft Bot Framework LUIS in waterfall conversation
body: <p>I have an existing waterfall conversation. I want to adapt it so that it can extract data from more complex user responses to the bot's questions. </p>
  
  <p>In my LUIS app I have created an intent called <code>GetLocation</code> which is trained to find an entity called <code>Location</code>. An example of this is the user typing "I am looking in Bristol" which would match the entity "Bristol". This is what I currently have:</p>
  
  <pre><code>function(session) {
         builder.Prompts.text(session, "Hello... Which city are you looking    in?");
  },
  function(session, results) {
      session.privateConversationData.city = results.response;
      builder.Prompts.number(session, "Ok, you are looking in " + results.response + ", How many bedrooms are you looking for?");
  },
  etc...
  </code></pre>
  
  <p>Instead of simply storing the response string, I want to send the response string off to LUIS and extract the city location from it. All of the LUIS examples I've found are for matching and going to new Intents however I simply want to keep the waterfall conversation going. How would I utilise LUIS to do this? </p>