In order to better assist you, may I please have your destination?
I need a train leaving from Cambridge this Thursday I'm going to king's lynn, and I need to arrive by 21:00.
{"__type": "Request", "service": "train", "values": ["destination"]}
{"__type": "Inform", "entity": {"__type": "Train", "arrive by": "21:00", "choice": "16", "leave at": "earliest leave time is 5:11 A.M."}} {"__type": "Request", "service": "train", "values": ["leave at"]}
There are 16 trains traveling that path that will arrive no later than 21:00. The earliest leave time is 5:11 A.M. Is there a time that you would like to leave?