generate response: Yes, please book for 7 people, and give me the reference number.. Intent: book_train. Slots: train-arriveby=19:00, train-bookpeople=7, train-day=monday, train-departure=cambridge, train-destination=peterborough
Response: Booking was successful, the total fee is 115.5 GBP payable at the station . Reference number is : U0JGF786 .