There are 133 trains traveling that path. What day would you like to travel on?
I need a train from birmingham new street to cambridge, please. I would like to leave on Wednesday sometime after 11:30.
{"__type": "Inform", "entity": {"__type": "Train", "choice": "133"}} {"__type": "Request", "service": "train", "values": ["day"]}
{"__type": "Confirm", "entity": {"__type": "Train", "leave at": "11:40", "trainid": "TR1670"}}
How about the TR1670? It meets your specifications and leaves at 11:40.