user_turns: <SILENCE> cheap restaurant west dont care <SILENCE> address phone number 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 ? What part of town do you have in mind? What kind of food would you like? api_call R_cuisine R_location cheap charlie_chan is a great restaurant serving chinese food and it is in the cheap price range Sure , charlie_chan is on charlie_chan_address The phone number of charlie_chan is charlie_chan_phone  you are welcome