Respected sir,
I am responding to this advertisement by writing this letter to you. I want to state that I believe that I am a capable person for this job. I have a good typing speed, I have a vast experience in Ms Office.
It is in my concern that the work has to be done under tight schedule, to tailor the work according to your needs. So, I do hope that we might continue the discussion regarding work in my inbox very soon.
My best regards to you.