generate response: It doesn't matter what time I leave as long as I arrive by 19:45. After you book me a ticket can you provide me with the reference number please.. Intent: book_train. Slots: train-arriveby=19:45, train-bookpeople=1, train-day=monday, train-departure=peterborough, train-destination=cambridge
Response: I have booked train TR7917 and it leaves at 18:48. The reference number is 78GFL146 .