This would accentuate why you will be very useful to the company or organization and how it will also be advantageous for you to be in the company. Another option if the two jobs are related is to list your skills and experience that apply to both jobs.
Keep your letter under one page. Emphasize your flexibility. If you're sending your cover letter in an email message, list your name and the job title in the subject line of the message.
Don't list any contact information or the date at the top. For example, write, "Dear Ms. Keep it brief. The biggest clues are within the job advertisement, so spend some time decoding the job ad.
Instead, start your email message with the salutation. You may also see business reference letter examples.