generate response: Book the earliest one for 4 people.. Intent: book_train. Slots: train-bookpeople=4, train-day=sunday, train-departure=peterborough, train-destination=cambridge, train-leaveat=21:15
Response: Okay, booking was successful. The total fee will be 52.8 GBP and your reference number is VFUX9JT1 . Is there anything else I can assist you with?