求一段图书馆里的英文对白~

Dialogue 1
-Good morning,Mrs.White.Can I help you?
-Good morning!I want to look for some books for my mother.
-Well,what kind of books does she like?
-She's very fond of detective stories.
-I see.Has she read any detective stories before?
-Oh,yes!
-Do you know if she's read this one?
-I'm not sure,but she probably won't remember if she has.She is very forgetful.
-Ah!She has a bad memory.How old is she?
-She is eighty-seven.
-I suggest you take this book.It's very interesting.
-Thank you.That's a good idea.She likes interesting books.Can you suggest another one?
Dialogue 2
-Excuse me,could you tell me where you have got that music book?
-Certainly.Let me see.Oh,it's on that shelf.
-It's too high.I can't reach it.Could you help me?
-Of course.Here you are.But what is use of this book to you and your job.
-I'd like to look for some information in this book.Thank you very much.
Dialogue 3
-Excuse me.
-Yes.May I help you?
-I'm a graduate student here in mathematics.I've just come from China and I've never used a western library before.I'll be here for five years,so I'd like to learn to use the library as efficiently as possible.I wounder if someone might have time to show me around.
-I'd be very glad to show you around,but I'm very busy right now.Could you come back about 3:30?
-Sure.3:30 this afternoon.
-Good.See you later.
-Thank you.Good-bye.
Dialogue 4
-Can I help you?
-Yes.I'd like to borrow these books.
-Just a second.I'll see if I can find them for you.
-Thanks.
-Here you are.You must return them within a month.
-What happens if I've not finished reading them within a month,for I need some important information in thesse books?
-You can come in and renew them unless someone else has reserved them.
-OK.Thank you very much for trouble.
-No trouble at all.See you.