123 Your Street
Your City, ST 12345
4th September 20XX
CEO, Company Name
123 Address St
Anytown, ST 12345
Thank you for your letter, I would like to thank you both for considering me for this position. It would be dishonest of me if I didn't tell you that I was most disappointed that I was not your final choice.
I was very impressed by the quality of your products and the working environment for your employees, especially as I noted the care and attention which was applied to the interviewing of each candidate and I can only imagine how hard the selection process must have been.
I appreciate you letting me know your decision. I would like to keep in touch and be considered for any future openings, even if they are freelance. I respect your company and it's ethics and would like to contribute where possible.
It was a pleasure for me to witness you and your team working together and sincerely wish all the best to the chosen candidate and hope that in the future we get an opportunity to work together. (I believe my skills are suitable for your team).
Should you wish to check my profile from time to time you can follow my #yournamehashtag where you see the latest on my career.