user_turns: <SILENCE> a cheap restaurant serving mexican food <SILENCE> how about chinese <SILENCE> address phone number 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 mexican R_location cheap Sorry there is no mexican restaurant in the cheap price range api_call chinese R_location cheap rice_house is a great restaurant serving chinese food and it is in the cheap price range Sure , rice_house is on rice_house_address The phone number of rice_house is rice_house_phone  you are welcome