I don't know anything about how this would work at AA, but my guess is the only hope would be the media and/or social media (Twitter?) teams, not a reservations or AAdvantage phone agent. You would almost certainly get a congratulatory tweet if you tweeted @AmericanAir a photo of the retirement party with some AA mention, since corporate social media teams respond to pretty much everyone who says something unsubstantively positive, but that may be a little less substantive than you have in mind.