title: Dialogflow(Api.Ai) Doesn't recognize custom entity
body: <p>I have been working lately with Dialogflow to make chatbots to do some simple tasks. For instance with webhooks and youtube api where the user ask to show  him a video and then the bot just answers with the youtube video url.</p>
  
  <p>E.G.
  USER SAYS 
  Show me Neil young harvest moon</p>
  
  <p>AGENT SAYS
  Here you go : <a href="https://www.youtube.com/watch?v=n2MtEsrcTTs" rel="nofollow noreferrer">https://www.youtube.com/watch?v=n2MtEsrcTTs</a></p>
  
  <p>I do this by using a custom Entity I called "YoutubeQuery" I checked "Allow Automated expansion" and unchecked "Define Synonyms" then I just added 2 values "Kavinsky Night Call" and "Indigo Night Tamino"</p>
  
  <p><a href="https://i.stack.imgur.com/EDxlc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EDxlc.png" alt="Entity with example values"></a></p>
  
  <p>In my Intent I just made a couple of training phrases like these:</p>
  
  <p><a href="https://i.stack.imgur.com/CZu0l.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CZu0l.png" alt="Training Phrases for my youtube intent"></a></p>
  
  <p>And everything works.</p>
  
  <p>Now my issue is with a new Agent which I called Orders</p>
  
  <p>I want just to get Order Id's from the firestore database, but before getting there I'm running in kind of a huge problem</p>
  
  <p>I defined the order's ID entity just like the one with the youtubeQuery. And I added some example Order ID's , I want them all to Start with OD and have 4digits after example (DX0001,DX0009,DX9999)
  <a href="https://i.stack.imgur.com/dAjxT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dAjxT.png" alt="order id&#39;s entity"></a></p>
  
  <p>Afterwards I made the intent 
  <a href="https://i.stack.imgur.com/UNHpc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UNHpc.png" alt="Intent of GetOrder"></a></p>
  
  <p>Now unless I give the EXACT order ID's from the traininphrase or the ID examples I defined in the Entity it will always give me a response with an empty parameter OrderID 
  I start my intent by saying "my order" then I get prompted with "What is your ID?</p>
  
  <p><a href="https://i.stack.imgur.com/dBlii.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dBlii.png" alt="intent start"></a></p>
  
  <p>So when I give an ID that has not been used in the training phrases of the Intent I get an empty value  in the parameters like this:</p>
  
  <p><a href="https://i.stack.imgur.com/hg4zT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hg4zT.png" alt="returning empty"></a></p>
  
  <p>But when I give an ID that has been used in the training phrases like for instance the first one DX0808 it does work...</p>
  
  <p><a href="https://i.stack.imgur.com/CVsh8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CVsh8.png" alt="Works"></a></p>
  
  <p>How can I make this work without adding all the possible order id's ranging from DX0001 to DX9999 in the training phrases or the entity. 
  I mean it does work for my youtube query, I can put anything there it does "catch" the value. Any help please?</p>