generate response: Can you book it for me and get a reference number ?. Intent: find_train. Slots: restaurant-area=centre, restaurant-bookday=friday, restaurant-bookpeople=7, restaurant-booktime=15:30, restaurant-name=fitzbillies restaurant, restaurant-pricerange=expensive, train-day=saturday, train-departure=cambridge, train-destination=peterborough, train-leaveat=12:00
Response: I need to know how many tickets you will need please.