I write to you to express my sincerest apologies for the untoward incident that took place last week involving the two of us. I am sorry for whatever problem and pain the incident caused you or your work.
I have been working with the company for ten years and I have maintained the highest standards of work ethics. Since you became part of the company, you have worked hard and I admire you for your dedication. I did not intend to criticize you for your work and I only meant to give you constructive comment to help you improve your performance. I hope we will be able to continue the good working relationship we had started.
Rest assured I will undergo the necessary process for my actions.