user_turns: <SILENCE> <SILENCE> cheap restaurant <SILENCE> sea food portuguese food <SILENCE> whats their 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 part of town do you have in mind? api_call R_cuisine R_location cheap thanh_binh is in the cheap price range I'm sorry but there is no restaurant serving cheap seafood food api_call portuguese R_location cheap nandos_city_centre serves portuguese food in the cheap price range Sure , nandos_city_centre is on nandos_city_centre_address  you are welcome