Percy obviously can't respond, since he's in the water and Peter wouldn't hear him anyway. He just keeps helping get all the passengers out of the water until they're all in a safe place. There is still a floating mass of water, but that'll be fixed once the gravity comes back.

Percy pops out of the water, completely dry despite having just taken a swim.

"All in a day's work. Thanks for your help. I should probably stay here until the gravity comes back on. We don't want any flooding."