There are 133 trains making that route, what day and time would you like to go?
I would like to find a train heading from Cambridge to Stansted Airport. I'd like to leave on Tuesday after 12:30.
{"__type": "Inform", "entity": {"__type": "Train", "choice": "133"}} {"__type": "Request", "service": "train", "values": ["day", "leave at"]}
{"__type": "Inform", "entity": {"__type": "Train", "arrive by": "13:08", "destination": "the airport", "leave at": "12:40"}}
I can get you on the 12:40, arriving at the airport at 13:08. Will that work?