dear sir,
in reply to your advertisement in i beg to offer my services as secretary with your firm.
i am 30 years of age, and have had five years' experience in the line of secretary. graduating from (the name of the) university in july 1980, i served with james & secretary until last month. besides i am skilled in almost all kinds of office machine. so i feel confident of my ability to fill a position such as you announce as vacant and give entire satisfaction in the discharge of my duites.
trusting you will give my application kind consideration and hoping to hear favourably from you at your convenience.
yours faithfully