Yep golfyetit...it tells me two things, one is obvious....that the presentation was cancelled for a reason, that's a no brainer...obviously there's a reason why.  

But whatever the reason was, she's not at liberty to divulge it.  To me that says its something of significance.  If someone missed the plane or a cab, or got sick or whatever....those kind of things she could have told me.  

So the question becomes, what could possibly be happening that would cause them to not present at a scheduled event?  It can't be anything benign....otherwise she could tell me why.