Batman nodded. Zoe relaxed in the suit; it didn't show in the stance, but Alfred could tell from the readouts. This had been a test. While she might not have passed it with flying colors, it was over, for now.
"You're welcome. Contact me if you need anything." Batman turned and started for the exit, and then paused. "It is good to know there are others out there to fight the fight." Perhaps it wasn't something Bruce Wayne would say, but there was something to knowing you weren't alone. While Dinah was in a way very much alone - Zoe would not come to the Tower without the suit on not for a long while - Dinah was not alone in that there was a Batman out there fighting with her, even if it was a different Batman.
There were no other parting words. The Batman just left. Dinah could find whatever she was looking for. Zoe hadn't come to take anything; she just wanted to know why the place was up and running again. She had to know if there were those who might cause problems for her in the future; she needed to know that they were more allies than not. Never knew who was using a base until you checked it out; they'd been reminded of that back when they went to see Mr. Universe. She wasn't going to be caught off guard like that again.