user_turns: <SILENCE> i need an expensive restaurant that serves afghan food how about korean food <SILENCE> whats the address whats the area thank you good bye
system_turns: Hello , welcome to the Cambridge restaurant system . You can ask for restaurants by area , price range or food type . How may I help you ? I'm sorry but there is no restaurant serving afghan food api_call R_cuisine R_location expensive curry_garden is in the expensive price range Sure , curry_garden is on curry_garden_address curry_garden is a nice place in the centre of town  you are welcome