user_turns: <SILENCE> cheap restaurant in the west part of town <SILENCE> address 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 kind of food would you like? api_call R_cuisine west cheap la_margherita is a nice restaurant in the west of town in the cheap price range Sure , la_margherita is on la_margherita_address la_margherita is a nice restaurant in the west of town in the cheap price range  you are welcome