Dear [Manager's Name],

I would like to express my sincere gratitude for the recent promotion that I received. I am grateful for the trust that you have placed in me and for the opportunity to take on additional responsibilities within the company.
It has been a pleasure working for this company for the past few years, and I am honored to have been given the chance to further my career here. I appreciate the support, guidance, and encouragement that you and the team have provided me, and I am grateful for the ways in which you have helped me grow both personally and professionally.
As you know, I am deeply committed to this company's success and to the success of our team. I am excited to take on this new role and to contribute even more to the company's growth and development. I will work hard to ensure that I continue to learn and grow in this position, and that I make the most of this opportunity.
In addition, I would like to thank you for believing in me and for recognizing my potential. Your confidence in my abilities means a lot to me, and I will do my best to live up to your expectations. I am eager to take on new challenges and to demonstrate that I am worthy of this promotion.
Again, thank you for this incredible opportunity. I am honored to be a part of this company and to work under your leadership. I will strive to bring my best to this role every day and to help the company achieve its goals.
Sincerely,
[Your Name]