generate response: I don't need a booking, but can you tell me the train ID, travel time, and arrival time of that train?. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=bishops stortford, train-leaveat=21:15
Response: TR0123 is the train ID. It leaves at 23:29 and arrives at 24:07. Did you need any more information about the train?