generate response: I am more interested in booking whichever will accept a table of four at 18:30 this Wednesday?. Intent: book_restaurant. Slots: restaurant-area=centre, restaurant-bookday=wednesday, restaurant-bookpeople=4, restaurant-booktime=18:30, restaurant-food=chinese, restaurant-pricerange=expensive
Response: Sir, I'm afraid none of those restaurants have a table available for that time period. Do you want to try a different day or time?