81, North 54 Street,
Clewiston, Florida, 03247,
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear SARA BROWN
Unfortunately, I cannot make it at 10 a.m. on May 1 in time for the conference. The only flight available is at 10:30 a.m., hence I am requesting you to cancel the space reserved for me on that date. On May 3, however, I will be attending, should there still be space available. Nevertheless, I am excited to get to know the new members of our organization.