Hallo... how are you? My name is Tom *manic grin* and there appears to be an empty seat next to you. May i sit down?
Subject A looks around desperately for another seat for Tom to sit in, a look of mild panic on his face, sags in defeat.... and nods slightly.
And so, at 9am on the second day. Tom Happens to someone.
I'd be pleased to sit next to you! :D