generate response: Actually, can you tell me the travel time for that?. Intent: book_train. Slots: train-arriveby=19:30, train-bookpeople=1, train-day=sunday, train-departure=cambridge, train-destination=stansted airport
Response: I apologize, TR5009 is available. It is a 28 minute train ride, leaving Cambridge at 18:40, arriving at Stansted Airport by 19:08. Your reference number is 090MN9HI .