[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I am pleased to tell you that I intend to attend the grand opening festivities at Boardwalk Café on Saturday, June 10. Please let me know if I can assist with preparations, and otherwise, I look forward to seeing you on the 10th.
[Sender's first and last names]