"Well, I would recommend having a way to defend yourself. There has been a murder on this train before, so it's not exactly like it's always safe here."

After saying that, there's a few moments where the young woman is just staring at him. Like she's thinking about something - or about a lot. Like what that favourite method is, for example, and why he wouldn't want to use it here, despite it being his favourite. And there's even more she's contemplating beyond that, which is most of what's keeping her quiet for said few moments.

But then she speaks up again, crossing her arms.

"Old man." Despite refering to him that way again, she sounds more serious about it this time. Like she's just decided this is his name now. "Can I trust you? How do I know you weren't lying about the whole experiment matter?"

There's a reason why Alice is asking it, really, but she has to make sure that he isn't just lying about that to win sympathy points.