【一】
A I want to speak to Mary.
B Sorry,Mary isn't here.Who is that?
A I am Tom,her classmate.
B May I take a message?
A Thanks.Please let her call me back.
【二】
What are you looking for?Oh,you want to buy a pair of shoes.How about this pair?It is made in Italy.Its style and color are both good,and the price is OK.Please have a try.And then make a decision.
PS:1楼2楼的当口语说说还是可以的,可是书面语就不行了,要符合语法规范.