gist6.js

app.intent('airportinfo', {
  'slots': {
    'AIRPORTCODE': 'FAACODES'
  },
  'utterances': ['{|flight|airport} {|delay|status} {|info} {|for} {-|AIRPORTCODE}']
},
  function(req, res) {
    //get the slot
    var airportCode = req.slot('AIRPORTCODE');
    var reprompt = 'Tell me an airport code to get delay information.';
if (_.isEmpty(airportCode)) {
      var prompt = 'I didn\'t hear an airport code. Tell me an airport code.';
      res.say(prompt).reprompt(reprompt).shouldEndSession(false);
      return true;
    } else {
      var faaHelper = new FAADataHelper();
   faaHelper.requestAirportStatus(airportCode).then(function(airportStatus) {
        console.log(airportStatus);
        res.say(faaHelper.formatAirportStatus(airportStatus)).send();
      }).catch(function(err) {
        console.log(err.statusCode);
        var prompt = 'I didn\'t have data for an airport code of ' + airportCode;
        res.say(prompt).reprompt(reprompt).shouldEndSession(false).send();
      });
      return false;
    }
  }
);
//hack to support custom utterances in utterance expansion string
console.log(app.utterances().replace(/\{\-\|/g, '{'));