How to reply to formal invitaion in letter format?
Format with suitable example

Such questions are meant to test your writing skills and should be attempted on your own. However, these points might help you elaborate:
The answer will depend on the kind of invite received, pointers for invite as a chief guest given below:
- I am honoured to receive the invite for being the Chief Guest at your school's Annual Day.
- I hereby accept the invitation and feel privileged to get an opportunity to interact with the students of such a prestigious school.
- You are requested to send the details of the programme to my personal secretary at abc@geezone.com.

Sample format of a formal letter is given below:
3, Lawrence Road,
New Delhi-110012, 
13 April, 20xx
 
The Manager,
Vibgyor Company Limited,
Barakhamba Road,
New Delhi-110011
 
Sir,
 
Subject: request for one day leave
 
I am ABC, an executive in the Sales Division of your company. This is to request you to grant me one day leave on 15 April, 20xx as I have to travel out of station to attend the wedding celebration of my cousin.

I assure you of meeting the minimum weekly sales requirement despite the leave. I will be available on my mobile number 73251690874 on the day of the leave.

Thanking you in anticipation.

Yours faithfully,
Raju Singh