Joke Collection Website - Public benefit messages - How to write short messages in English?

How to write short messages in English?

The one in the middle of the key bottom line is

Dear Professor:

I'm sorry to text you, because you may have something to do. I already know that you will be a lecturer in microeconomics next semester, and I am honored to be your student. I am very interested in this course, so I want to know what kind of textbooks we will use then. Can you give me information? I'm sorry to trouble you, thank you very much!

Yours,

XXX