generate response: I'd like to leave on Tuesday after 21:30, please.. Intent: find_train. Slots: train-day=thursday, train-departure=cambridge, train-destination=stevenage, train-leaveat=21:30
Response: There is only one train traveling from Cambridge to Stevenage on Thursday close to 23:30. It is the TR8239, would you like for me to book you a ticket?