generate response: I apologize. I may have confused you a bit. I would like to leave after 18:30.. Intent: find_train. Slots: train-day=sunday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=18:30, 6:30 pm
Response: There is no train leaving at the time you require,unless you try a different day,would you like to try a different day?