generate response: Can you book that for 6 people at 09:45 on saturday?. Intent: find_train. Slots: restaurant-area=south, restaurant-bookday=saturday, restaurant-bookpeople=6, restaurant-booktime=09:45, 9:45, restaurant-food=european, restaurant-pricerange=moderate, train-day=saturday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=18:45
Response: Unfortunately, there are no tables available at that time. Would you like to try another time or day?