Not a question, an assertion

I'm sitting at the Reference desk at 11.15am, and a couple walk down the steps having a high-volume conversation bordering on a spat. I'm the only person at the desk. The woman reluctantly looks over at me, looks away, and, quite reluctantly, walks over to me.

"I guess you're the person I have to see," she asserts, not convinced of the veracity of that statement she herself has made.

I smile and say, "I'm the only one here."

She hands me a piece of paper with a call number written on it. I point out to her where she'll find the book.

She walks away, muttering, "I've never been down here."

Not a close encounter of the library kind.