What time would you like to leave?
Please help me locate a train that departs from Cambridge and is going to Leicester. Thanks. I'm flexible about departure time, but I must arrive by 18:45 on Saturday.
{"__type": "Request", "service": "train", "values": ["leave at"]}
{"__type": "Inform", "entity": {"__type": "Train", "arrive by": "18:06"}} {"__type": "Confirm", "entity": {"__type": "Train"}}
There is a train that will arrive at 18:06. Would you like me to book it for you?