Dear Sir/Madam,
I am a student in this university who regularly comes to the library to spend my spare time. Generally speaking, the services you offer here are quite good; however, I have some suggestions for you to adopt. And I would like to extend my greatest appreciation if you are so kind as to take my suggestions into consideration.
To begin with, will you please prolong the time for reading? In the daytime, most of the students are having class, so they can’t come to the library. Moreover, some of the books on shelves are out of date. If you are so kind as to provide us some books such as the latest magazines, we will be very pleased.
I really wish to have a more comfortable library. Thank you for your time and consideration.

  Sincerely yours,
   Li Ming