generate response: What are the other 4 times of departure for Saturday. I'll need bookings for 5 people and a reference number.. Intent: book_train. Slots: train-bookpeople=5, train-day=saturday, train-departure=stansted airport, train-destination=cambridge, train-leaveat=19:30
Response: Alright, I booked 5 tickets for Saturday train your reference number is 1R61PO9r . You can pay for your tickets at the station. Is there anything else?