title: Bot framework 4 Add additional metadata to Choice Prompt Choice
body: <p>I'm developing a bot with BotFramework 4 where I prompt the user with a choice of a few dynamic dollar amounts for example like:</p>
  
  <p><em>please choose an amount 1) total statement balance $29.99 2) total outstanding balance $35.00</em> </p>
  
  <p>and currently I get back the answer with the whole text value and I need to parse out the value.
  my question is is there a way to add some underlying metadata to the choice object, for my example I'd add the dollar amount so when the user chooses an option I'll get back the dollar amount for that choice   </p>