When the girl wandered in, Vision had been looking at a computer screen. His hand had been raised and the screen seemed to be functioning, processing within it's data systems, perfectly fine...save that he was not using any normal motions. The system was all so touch screen, so swipe-left and spread fingers to blow work up, so...manual. Well, he did not need that. There was a look in his eyes as if he were equally processing the information at hand before he blinked and took his hand away at the presence of another.
He turned in a slow, fluid motion. Vision was not startled, though he had not expected company. He was actually pleasantly surprised. So far since his birth he had lived an exciting and equally lonely life.
"Good morning, miss. No, I am not a ghost." Files...files. Yes. She was now vaguely familiar based on her forum post. Got it. Good.
"My name is Vision. Can I help you?" he asked in that cordial way he did, as if he still--had ever--worked here. Of course he was not technically the system Tony had so lovingly crafted over the years, but he technically wasn't not the system, either. His kindness and manners clearly came from JARVIS. As well as his attempt at humor.