generate response: I'll be traveling Tuesday, and need it booked for 8. Could I also get the reference number for that as well?. Intent: book_train. Slots: restaurant-area=east, restaurant-bookday=tuesday, restaurant-bookpeople=8, restaurant-booktime=18:30, restaurant-food=italian, restaurant-pricerange=expensive, train-bookpeople=8, train-day=tuesday, train-departure=stevenage, train-destination=cambridge
Response: The first train leaves Stevenage at 05:54 and every two hours thereafter until the last train at 23:54. What time would you like to leave or arrive?