generate response: Yes, please. I need a table for 8 at 11:30 on Sunday. And may I please have the reference number?. Intent: book_train. Slots: restaurant-area=west, restaurant-bookday=sunday, restaurant-bookpeople=8, restaurant-booktime=11:30, restaurant-food=vietnamese, restaurant-name=thanh binh, restaurant-pricerange=cheap, train-arriveby=15:30, train-bookpeople=8, train-day=sunday, train-departure=cambridge, train-destination=london liverpool street
Response: OK, your reservation is booked, your reference number is RQ5HR7PY .