user_turns: <SILENCE> restaurant in the center thai food how about thai food <SILENCE> address phone number what type of food 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 ? What kind of food would you like? I'm sorry but there is no restaurant serving afghan food api_call afghan R_location R_price ask is a nice place in the centre of town Sure , ask is on ask_address The phone number of ask is ask_phone ask serves italian food  you are welcome