Dear Sir/Madam,
Hello. I hope this message finds you well. I am writing to express my interest in working on your project. I have keenly read and understood the project description. I would like to confirm that I am qualified to execute this project. I am willing and able to deliver and exceed your expectations.
Kindly click on the "Hire David C" button and let me start working on it right now. However, in case you do not hire me, you are still my good friend. There is always a next time.
Thank you for your time and consideration.
Yours Sincerely,
David C.