根据下面的对话开头把对话补充完整.要求：不少于60词.A:Good afternoon,what can I do for you?
B:Well,I'm looking for a pair of mule for my mom.
A:There are many types of mules.Please check here.All mules are on sale.
B:Oh,yes.But could you please introduce some popular ones?
A:Sure.This red one,and that blue one is very hot.
B:Yes,I guess the blue is better.Do you have 37 size?
A:Sorry,37 size of this type is sold out.
B:Well,maybe the red one will do.
A:Besides red color,we also have white color for that type.
B:Show me the white one,pls.
A:OK.Here you are.
B:How much is it?
A:200 yuan.after discount,it is 180 yuan.
B:Good,I'll take this one.
A:Here you are.
B:Thank you,bye.
A:You're welcome.See you.
