Write a Dialogue between you and your headmaster asking for three days leave
Jabed: Can I come in, sir?
A.T.M: Yes, please come in. Is something wrong?
Jabed: Sir, I need to take a few days off from school.
A.T.M: Have a seat. Which class are you in?
Jabed: I'm in Class 9, Section B.
A.T.M: Your midterm exams are coming up soon. Why do you want to take leave now?
Jabed: My sister's wedding is on the upcoming Friday, sir. I'll be busy with that for a few days.
A.T.M: Your sister's wedding, I see. Wasn't she a student at our school too?
Jabed: Yes, sir. My sister is Rebeka. She finished her SSC exams from here in 2006.
A.T.M: Ah, yes. Rebeka was an excellent student. Isn't Masud Parvez your father?
Jabed: Yes, sir.
A.T.M: Please give him my regards.
Jabed: Certainly, sir. He's planning to come to school soon to invite all of you.
A.T.M: That's good to know. So, how many days of leave are you requesting?
Jabed: I need a leave of three days, sir.
A.T.M: Alright, write a letter to me formally requesting a three-day leave.
Jabed: Thank you very much, sir.