Most of the people in the Plaza are wandering around, asking questions or going about their days. Depending on her perception roll how closely she's paying attention though, she may spot a young man stopping to pull a phone out of his pocket right after she sends her reply. He stops and looks down at it and then starts working on a reply.

Sure enough, a moment later.

I haven't talked to him more than once or twice. But a friend of mine works with him. Suit, short brown hair, extremely serious. Seems to fit.