I can do that for you! Is there a particular destination, or even an arrival or departure time you need?
I'd like a train leaving from Cambridge on Sunday, please. Going to norwich. Arrive by 17:00.
{"__type": "Request", "service": "train", "values": ["arrive by", "destination", "leave at"]}
{"__type": "Inform", "entity": {"__type": "Train", "arrive by": "10:55", "trainid": "TR4969"}} {"__type": "Confirm", "entity": {"__type": "Train"}}
TR4969 will get you to Norwich by 10:55. Would you like me to book it for you?