Below is a sample response for a scenario where an employee is accused of . You can adapt the bracketed sections to fit your specific situation.
[Your Printed Name]
Please find attached the following supporting documents: explanation show cause letter reply sample
Or for a mistake: The error in the report was due to a technical glitch in the software which corrupted the data column. I was unaware of the corruption until the audit was performed. Below is a sample response for a scenario