generate response: I am departing from Stansted Aiport and would like to arrive by 13:30.. Intent: find_train. Slots: train-arriveby=13:30, train-day=sunday, train-departure=stansted airport, train-destination=cambridge
Response: TR5358 will depart the airport at 12:24 and arrive at Cambridge at 12:52. Would you like to book a ticket?