generate response: That sounds good. I need tickets for 4 people. Can I get a reference number?. Intent: book_train. Slots: train-arriveby=11:30, train-bookpeople=4, train-day=thursday, train-departure=stevenage, train-destination=cambridge
Response: Booking was successful, the total fee is 51.2 GBP payable at the station. Reference number is : XX5DNFKS .