Dr. Renowned Name
XYZ Hospital, Main Road
City, State
Date: March 15\textsuperscript{th}, 2024
To,
The President
Alumni Association
Green School
Subject: Regret for Inability to Attend Graduation Ceremony
Dear President,
I am honored to have been invited as the Chief Guest for the Annual Graduation Ceremony on March 24\textsuperscript{th}, 2024. However, due to a prior professional commitment, I regret to inform you that I will be unable to attend the event.
Please convey my heartfelt congratulations to the graduating students and best wishes for their future endeavors.
Warm regards,
Dr. Renowned Name