After you have written down the date, you can move on to the body paragraph that contains your intention to apply for job. Things you would state include your objective of joining the company? How can you enhance company's productivity? What is your previous experience in the field you are applying for? What is your academic background and how it can help you in your job? Lastly you can list down basic skills and experiences that you have attained from previous jobs, if any.
In sum, the rationale underlying the Seller's demand for LOI, can essentially be summed up as follows: 1) That giving an LOI to a seller by a prospective buyer, is an indication that the buyer is "serious" and willing to purchase; 2) That use of the LOI is the usual way of initiating a purchasing proposal by a buyer, and is the right and proper way to go; and 3) That there is nothing for anyone in the deal to lose by a prospective buyer signing an LOI.