Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Mention how their presence contributed to the success and positive atmosp. The message of appreciation should stand alone. Be brief, warm, and sincere. In this article, we offer some tips and examples to help you write a great thankyou letter to your manager. I'd like to thank you for talking with me about the research- assistant position in your seismology lab.