Formal Letter  
 Mrs. Savita Manjrekhar 
Professor of English 
[Your Address] 
[City, Pincode] 
[Date] 
  
 To, 
The Principal 
J.M. Public School 
Cochin 
  
 Subject: Regret in Accepting the Invitation for Judging the Debate Competition 
  
Respected Sir/Madam,  
I am honored to have received your invitation to judge the inter-school debate competition at your esteemed institution. However, due to prior academic commitments, I regret to inform you that I will not be able to attend the event.  
I sincerely appreciate the opportunity and extend my best wishes for the success of the competition. I hope to participate in future events at your institution.  
Thank you for your understanding.  
 Yours sincerely, 
  
Mrs. Savita Manjrekhar