message: Adding roles to example
diff: "intentLabel": "BookFlight",
  "entityLabels": [
  {
  - "entityName": "Location::To",
  + "entityName": "Location",
  "startTokenIndex": 7,
  - "endTokenIndex": 7
  + "endTokenIndex": 7,
  + "role": "To"
  },
  {
  - "entityName": "Location::From",
  + "entityName": "Location",
  "startTokenIndex": 5,
  - "endTokenIndex": 5
  + "endTokenIndex": 5,
  + "role": "from"
  }
  ],
  "intentPredictions": [
  