generate response: Any arrival time is fine, can you give me an arrival time and travel time?. Intent: find_train. Slots: train-arriveby=dontcare, train-day=tuesday, train-departure=broxbourne, train-destination=cambridge, train-leaveat=08:15
Response: The travel time is 1 hour. There's a train leaving at 08:32 and arriving at 9:32, will that be acceptable?