谁能给我设计一个在服装店购物的英语情景对话对话尽量长点,但不要太长!

One day, I want shopping with my mum,the assistant is very kind ,she asked :"Can I help you ?Madam",Mum said :"Is there T-shirt for my son here?"How old is your son?Ten years oldYes, This way Please.Which color do you want ,madam?Blue is Ok.Do you have blue?What about this one ?Ok great How much is it?16 US$Here is 20$THIS IS 4 $ for you ,here you are .Thank you Thank you ,too
看在我一个初一学生的面子上选我的吧,虽然我的不是很好