user_turns: <SILENCE> im looking for a cheap restaurant that serves portuguese food portuguese yes i dont care <SILENCE> <SILENCE> what is the address and phone number okay good bye 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 ? There are restaurants in the cheap price range . What type of food do you want? You are looking for a portuguese restaurant right? What part of town do you have in mind? api_call portuguese R_location cheap nandos_city_centre serves portuguese food in the cheap price range nandos_city_centre is a great restaurant The phone number of nandos_city_centre is nandos_city_centre_phone nandos serves portuguese food in the cheap price range  you are welcome