generate response: I'd like to book a table for the same number of people (5) for that same day at 16:15 if it's available. I'd also like the reference number for that please.. Intent: book_restaurant. Slots: restaurant-bookday=monday, restaurant-bookpeople=5, restaurant-booktime=16:15, restaurant-name=sitar tandoori, restaurant-pricerange=expensive
Response: Unfortunately, the time that you provided for 5 people is not available. Do you have other times that you prefer?