user_turns: <SILENCE> i want to find a moderately priced restaurant that serves vietna ne vietnamese <SILENCE> in the cheap price range can i have the address the east part of town <SILENCE> what about the west part of town <SILENCE> can i have the address thank you goodbye
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 moderate Sorry there is no vietnamese restaurant in the moderate price range There are restaurants serving vietnamese in the cheap price range . What area would you like? What part of town do you have in mind? api_call vietnamese east cheap Sorry there is no cheap restaurant in the east of town serving vietnamese food api_call vietnamese west cheap thanh_binh is a nice restaurant in the west of town serving vietnamese food Sure , thanh_binh is on thanh_binh_address  you are welcome