What is an example of an excuse letter for not attending a recollection?

[Your Name]
[Your Address]
[City, State, Zip Code]
[email Address]
[Date]

[Recipient's Name]
[Recipient's Position]
[Organization/School Name]
[Address]
[City, State, Zip Code]

Dear [Recipient's Name],

I hope this message finds you well. I am writing to inform you that I will not be able to attend the upcoming recollection due to a prior commitment that I cannot reschedule. I apologize for any inconvenience this may cause and appreciate your understanding. Thank you for your support.

Sincerely,
[Your Name]