dear ,
ms. huang lijia of your company has told me that your dept needs a manager assistant,and i wish to apply for the position. i will graduate from commercial school next month. my outstanding record at school and some experience in business has prepared me for the work you are calling for.
i am really interested in learning business practice,and also a diligent worker and a fast learner. if given a chance, i am sure i can prove my worth in your company.
i will be available during the weekdays in the morning for any interviews you may want to give. enclosed is my resume,and hoping for your immediate reply.
sincerely yours,
x,xx