How to resign with
This letter is to let you know that I am concluding my employment with (company) effective (date).
The time I have spent at (company) has been most rewarding and helpful in my career, and I hope that my contributions to the company have been constructive. My relationship with you has always been professional, warm and results oriented.
I have accepted a position that will enhance my career growth and will expose me to challenges and opportunities which I believe are in my best interest and my families best interest. Should you flatter me with an offer to remain, I could not, under any circumstances, consider it. My decision has been made it is irrevocable and final.
(Bossí first name), I have the utmost respect for you and wish you nothing but the best for you and (company). If I can be of any special assistance during my final two weeks, please feel free to call on me.