È costoso? 
Yes, it is listed as expensive in my database. Would you like more information on it?
Avrei bisogno di un ristorante costoso. What kind of food are you interested in?
Preferirei del cibo vietnamita. No restaurants matching your queries have been found. Would you like to search for another food type?
Ci sono altri ristoranti che servono cibo nord americano?  Gourmet Burger Kitchen is an expensive restaurant that serves North American food.