Katniss is quiet after a moment, because she doesn't know much about the different time periods. There was the one she ended up in in Chicago, and then the future that she came from (and a different future she ended up in).

"That's good." That Rebekah wasn't alone. She sinks down into a chair, grateful to be anywhere that isn't where she was before and now she's with a friend. A friend she recognizes and not some strange other version of a friend. "What... time period? I mean, what was it like?"