I would like to express my sincere and heartfelt thanks for the wonderful and professional treatment received therein. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). If you're not sure what to write in a thankyou note, this article on messages of appreciation has message examples and tips to get you started. An employee appreciation or thank you letter is a formal message from an employer that recognizes the former's contribution to the company they work for. Thank you for your outstanding care and support during my stay at the hospital. Our family appreciates your dedication to your work. Dear Healthcare Worker, To begin I want to thank you for being there everyday and showing up to help those in need. I am writing to extend my heartfelt thanks for the exceptional care you provided during my recent hospital stay. Sterling, Va. I wanted to take this time to express my gratitude to the personnel that work at the Sioux Falls Veterans Hospital.