generate response: I would like a train that is leaving after 18:15 and is going to Peterborough.. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=peterborough, train-leaveat=18:15
Response: Alright, you have 11 options. Trains from Cambridge to Peterborough leave twice an hour, beginning at 18:34 and running until 23:34. Would you like me to book one of these trips?