generate response: I need to leave on Monday. Can you book me for 4 people and can I get the reference number?. Intent: book_train. Slots: train-bookpeople=4, train-day=monday, train-departure=cambridge, train-destination=stevenage, train-leaveat=15:45
Response: TR0254 leaves Cambridge at 17:21. The Booking was successful, the total fee is 51.2 GBP payable at the station . Reference number is : 5K1EMDSS .