good morning sir :what can i do for you? B:yes ,please,i would like to order A:What would you like do eat? B:coffee and sandwish please. A:Ok, anything else? B:No,thanks. A:all right,wait a moment please. After some mins. B:waiter,pay for the dinner please A:Hi,sir ,it is 20us doolars, B:Here you are A:thank you sir,welcome back A:bye-bye B:bye-bye