Ok. And where will you be departing from? What time would you like to leave? How about TR2895? It leaves at 05:59.
I need a train going to london liverpool street. I will be departing from Cambridge on Saturday. I don't have a departure time but I want to arrive by 16:45. That sounds great. Can you book 3 tickets for that train?
{"__type": "Inform", "entity": {"__type": "Train", "leave at": "05:59", "trainid": "TR2895"}}
{"__type": "NotifySuccess", "service": "train", "entity": {"__type": "Train", "ref": "H5MDQ0XR"}}
Your booking is complete. Your reference number is H5MDQ0XR .