Jessica,
This sounds like a typical question for a school assignment. You have landed
in the Word newsgroup which is dedicated to helping people who are learning
how to use Word. I would suggest a Google search for what you are after.
Luc

Dear person
   Thank you.
Love Jessica

If you need to say more than that, say it. Otherwise don't. Woruber man
nicht sprechen kann, daruber musst man schweigen.