Subject: Request for Leave of Absence
I hope this letter finds you well. I'm writing to let you know that I won't be able to come to school for the next ten days. The reason is that my older sister is getting married in Mumbai. The wedding is scheduled for May 5th, and we will be back on May 11th. Because of this, I won't be able to attend classes during this time. I kindly request you to grant me leave for these days. I've attached a letter from my father, giving his consent for this.
I would greatly appreciate it if you could approve my request. Thank you for your understanding.