user_turns: <SILENCE> im looking for an expensive restaurant that serves portuguese food <SILENCE> is there anything that serves north_american <SILENCE> can i have the phone number and post code please 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 ? api_call portuguese R_location expensive Sorry there is no portuguese restaurant in the expensive price range api_call north_american R_location expensive gourmet_burger_kitchen is a great restaurant serving north_american food and it is in the expensive price range The phone number of gourmet_burger_kitchen is gourmet_burger_kitchen_phone  you are welcome