generate response: I would like to depart from stansted airport. Can you book me a train for 3 people and provide a reference number?. Intent: book_train. Slots: train-bookpeople=3, train-day=saturday, train-departure=stansted airport, train-destination=cambridge, train-leaveat=09:45, 9:45
Response: Sure, the train leaves at 10:24, Reference number is MEFVDBWF . What else can I help with today?