[Your Name]
[Your Address]
[City, State, Zip Code]
[Email Address]
[Phone Number]
[Date]

[Recipient Name]
[Recipient Title]
[Company Name/School Name]
[Company/School Address]
[City, State, Zip Code]

Dear [Recipient Name],

I am writing to inform you that I was unable to attend [work/school] on [specific date(s)] due to a personal matter that required my immediate attention. I apologize for any inconvenience my absence may have caused.

I understand the importance of my responsibilities and have already taken steps to ensure that my absence does not affect my [work/schoolwork]. I am committed to making up for any missed time and will do my best to stay on track moving forward.

If you require any additional information or have any questions, please feel free to contact me. Thank you for your understanding.

Sincerely,
[Your Name]