This seems like a professional conversation, the two in the nearby booth.  It's not two coworker friends in the same uniform on their lunch break.   I can tell by the way he's nodding his head so intently so as to show he's following along.  If this were a casual conversation, the way she's going on, guy would probably be thinking, God when is this bitch going to stop talking about her boyfriend and blow me already.

But no.  I think she's his supervisor.  Guy's probably lazy, or shows up late too often.  He's still probably not paying attention—just nodding his head.