There are real ones? That’s news to me.
Oh, for God’s sake. You were on a tour of a haunted jail. Doesn’t it stand to reason that people who would tour a haunted jail would have an interest in ghosts, and at some point would have wondered if ghosts were watching them? Of course your friend has wondered if they know she’s there!
What’s the alternative–to believe that, out of 7 billion living people on the planet, the ghosts at your museum and your friend’s father both chose to chat up a tour guide in St. Augustine, Florida? And gave the tour guide an accurate enough description so that she would recognize your friend, but couldn’t get details like your father’s pet name right?
Don’t pander to this kind of nonsense.
There needn’t be to make SCL’s statement mathematically true. A special case of x>y is x>0. 
In her defense, she didn’t go to visit it because it was supposedly haunted. She went there to tour it because it was a historic building. (And she said she was a bit irked when she discovered it was a guided tour because she had hoped to be able to hurry through because they had another destination.)
ISDP lady told her that the spirits were all around her, “with” her all the time. (To which I replied that I should hope that the afterlife would be more interesting than that. She laughed.)
Part of her knows it’s nonsense, but she thought that it was something “different” than the John Edward-style cold reading.
True, not every person would be a “true believer” going in. But what’s the most generic statement you can make to anyone who has even the vaguest notion about ghosts? “You wonder if they know you’re there.”
Most of us, and especially someone with an elderly parent, deal with old houses from time to time. I live in a white-bread suburb, but I volunteer at a “living history farm”. And when I wander around the old farmhouse, restored to exactly the way it was when a family lived there in the 1890’s, I can’t help but think about ghosts and whether the family knows that we turned their house into a museum. I don’t believe that they do know, because I’m a rationalist, but I’ve wondered about it. I wouldn’t be human if I didn’t.
So the tour guide would get the same reaction from me. It just doesn’t mean anything.
There’s another I-talk-to-dead-people woman on Lifetime now and it’s so obvious what she’s doing while talking to the survivors. These sisters lost their mom and the “psychic” says “You didn’t hear from her for two days” and they said how it was three days before they discovered her, and the “psychic” says “oh, I saw two” Sisters: “We weren’t sure what day she died and you just cleared it up for us.” WHAT? If your mom comes and talks to this woman, couldn’t she come tell you what’s up? If ghosts can rattle things in the house, couldn’t they write you a note instead?
I would ask her why all the ghosts of men who died young aren’t more often found in Cheerleader’s dressing rooms.