generate response: I need to go to stansted airport and will be departing from cambridge. Intent: find_train. Slots: train-day=friday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=13:45
Response: The closest to 13:45 is 14:40, which is the TR1316. It arrives at Stansted Airport at 15:08. Do you still want to book it?