generate response: May I have the reference number for the reservation?. Intent: book_restaurant. Slots: restaurant-area=centre, restaurant-bookday=sunday, restaurant-bookpeople=6, restaurant-booktime=13:00, restaurant-food=indian, restaurant-name=panahar, restaurant-pricerange=expensive
Response: I am so sorry but the panahar is fully booked. My I find another restaurant for you that serves Indian food?