If this happened as written, it is a total cop-out by Bing to refuse JetBlue's request for the date of the incident.
"Patrick" 's behavior was beyond rude and it should be addressed with him.

If this was an isolated incident, it will be noted in his file, he'll be "counselled" and that's about it. He won't be fired unless this is the latest in a string of bad behaviors and he has not responded to previous counselling.

It cannot be addressed in anyway if details to positively identify him are not provided.