Диалог на ангийском «в магазине»! Помогите, срочно)

В магазине одежды -Can i help you? -Yes, what size is this shirt? -let's see. A small. What size do you want? — A medium.-This is a medium-Thanks. Where can i try it on? — The changing rooms re over there.Thank you.-Haw is it? -it's fine. Haw much is it? -34,99-Do you take American Express? -Yes, sir