generate response: Yes, I am leaving from Cambrige. How long is the travel time?. Intent: book_train. Slots: train-bookpeople=1, train-day=sunday, train-departure=cambridge, train-destination=broxbourne, train-leaveat=15:15
Response: Booking was successful, the total fee is 14.32 GBP payable at the station . Reference number is : EWSOVUHU .