Can I help you?
I'd like a pair of sports shoes.
Well, we have all kinds of sports shoes. Could you tell me what kind of sport you usually do?
I just like jogging.
OK, then you can buy a pair of jogging shoes. Here are jogging shoes. Which pair do you like best?
Er. . . , that blue pair. I need size 43, please.
Here you are. You can try them on.
Very comfortable. I'll take them.