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".
A letter of intent or LOI can be used in many different circumstances and is an outline of an agreement between two or more parties before it is finalized. These letters of intent spell out all the particulars so that each company or party entering into the agreement has a better understanding of what is involved. Letters of intent are used in many different faucets of the business world and are similar to a written contract only not as binding. A letter of intent is exactly how it sounds; it is a letter that is stating an intended purpose.