user_turns: <SILENCE> <SILENCE> vietnamese <SILENCE> is there another and the address what area is that 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 vietnamese R_location cheap thanh_binh is a great restaurant serving vietnamese food and it is in the cheap price range The phone number of thanh_binh is thanh_binh_phone Sure , thanh_binh is on thanh_binh_address thanh_binh is a nice place in the west of town  you are welcome