generate response: My destination is London Liverpool Street, departing on Wednesday from Cambridge after 14:15.. Intent: find_train. Slots: train-day=wednesday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=14:15
Response: I have a train TR 2815 leaving cambridge at 15:59 on wednesday and arriving at 17:27 at london liverpool street. Would you like to book this?