I would like to book a train that leaves from Broxbourne on Wednesday. Can you book that for me?
{"__type": "Inform", "entity": {"__type": "Train", "choice": "5", "destination": "Cambridge"}} {"__type": "Request", "service": "train", "values": ["leave at"]}
If your going to Cambridge, I have 5 trains running. Do you have a particular time?