[She knows that there's a chance that confirmation may not come the way Algidus hopes. While Rey doesn't want to entirely get his hopes up, she doesn't want to smash them when she knows the other guy is quick to react.

[So she just sighs.] Will let you know if there are any new developments. Unfortunately, things are too different now from the way they used to be to know for certain where some people have disappeared to. When we were on the ship, we at least knew for a fact where people went if they went missing after a jump.