I like what others have said. "hi I'm Silly and I do not want to drink today" or "hi I'm Silly and I have a desire to stop drinking". Only at Closed AA meetings should you be a person with a desire to stop drinking. Open meetings invite all types of people interested in AA. Sometimes it's medical students, sometimes it's family members, sometimes it's those who aren't sure and don't want to impose on a closed meeting.
You'll notice that even at closed meetings many people do not introduce themselves as addicts or alcoholics. They simply say they are grateful members of AA or that they're sober today through the grace of god or through the power of AA.