Sophie doesn't push, because the concept of living forever (or just a lot) is too alien for her to think of it as natural, especially when she knows her own life is going to be shorter.

"Wow. That old? So do you like, work with him? Because I'm not sure I can just up and talk with someone else I don't know out of the blue for at least a week. You did say you know him."

And as she waits for an answer she sits anywhere without people and starts wolfing down her food. No time to waste.