Dear Mr. Smith,
Ms. Maria Mayor of your company has told me that your department needs a managerial assistant, and I want to apply for the position. I graduated from the University of Business and Economy last year. My major was Human Resource. I have some business experience that I believe qualifies me for the position.
I am really interested in learning business practices. I am a diligent worker and a fast learner. If given a chance, I am sure I can prove my worth in your company.
I am available during the weekdays in the morning for an interview. Please find my resume enclosed. I look forward to hearing from you.