How can I write an application for leave of absence ?

Question : Write an application to your Headmaster praying for leave of absence. Ans : September 28, 2013 The Headmaster Charbairabi High School Haimchar, Chandpur. Subject : An application for leave of absence Dear Sir, I beg most respectfully to state I could not attend school from the 24th to the 27th instant on account of fever. May I , therefore, pray and hope that you would be kind enough to grant me leave of absence for those days only. I remain, Sir, Your most obedient pupil, Md. Nasir Uddin Class-X Roll-