Proofreading?

Hi teachers, please help me correct my letter if there are any mistakes. Thank You!

Dear Mr. White,

I am writing to require some information about your training courses.

One of my clients who took your courses a few months ago recommended your firm to me. He told me that the in-house training courses you offered were really helpful.

Therefore, I am really interested in your service, and I am going to arrange some of my staff to take your courses in the next few weeks.

Firstly, we have just taken on some new staff in our customer service department. So, I would like to know if you could provide them with one-week databases courses.

Additionally, there are some employees in our IT department who need a few individual training courses in graphics.

Finally, I heard that your company will offer special discount to new participants in the first training course. So, I would like to know how much discount you will offer to our company. Besides, could you please send us some application forms by the end of this week?

Thank you for your time, and I look forward to hearing from you as soon as possible.

James Black

Personnel manager
XXX Ltd