Jacky:Hello!(1)Can I help you?
Mary:Yes,I'd like a pair of shoes.
Jack:(2)What coulour do you want?
Mary:Red
Jack:Sorry.We don't have any red shoes.Look at these blue shoes.They look very nice.
Mary:OK.I like blue too.(3)How much are they?
Jack:Forty dollars.
Mary:OK.(4)I'll take them.
Jack:Here you are.
Mary:Thank you.
Jack:Not at all