I still say that shahn12 needs some evidence that his reputation HAS been harmed before he has a valid lawsuit. If a single unproved instance is enough to "damage his reputation" how good was it to begin with? If no one believed what was said, he's got no damages. He doesn't get to sue because maybe there'll be some feedback in future.
Evidence will be needed but Florida is a state with "per se" defamation. Once a plaintiff shows that false words were published about him, proof of
harm will not always be necessary. Some statements
presume harm.
In Florida, per se defamation would include statements that falsely accuse someone of committing a crime, of having a mental illness or "loathesome" disease, of having questionable morals (e.g., being unchaste), or of being incompetent or dishonest or unethical in one's trade, occupation or profession.
Damages can be awarded on this presumed injury (although damages awarded on presumed injury alone tend to be nominal).
I don't know that shahn can easily support a defamation claim. He would need to discover who the server is, what exactly the server said to hotel security (and why) and he would want witnesses. He would need to show negligence. And he would want some demonstrable damages to make pursuing a claim worthwhile.