At the end you should sign off with "sincerely yours" or any other related salutation. If you are writing a letter of intent for graduate school then it would have a different content. First of all letter of intent would start with your name, address, contact number and email address. After you have mentioned the date, you should then add a salutation like "Dear Sir/Mam".
So let's look at a few misconceptions. Often in understanding International Business you have to unlearn many things first, much of the information out there particularly is inaccurate or worse dangerously ambiguous.