"No, I'm here by accident," Terry replied with a small frown. It was entirely possible that it wasn't an accident, and rather the act of a disgruntled enemy, but he certainly had no mission.
So she was familiar with masked heroes. Terry wasn't sure how that made him feel. If criminals and vigilantes were running around this city, then maybe he had been pulled there on purpose. Maybe someone needed help. He wondered if he'd recognize any of the vigilantes in the paper - he'd have to get his hands on a copy. Terry was running through the possibilities when Allison asked him yet another question.
"I'm a hero," Terry replied. Sure, she didn't know that, but the idea that he could be a criminal still offended him a little. Not that he necessarily had a completely clean past. Or maybe because he didn't have a completely clean past. "I catch the bad guys."
As for what he did when he wasn't being Batman - or wasn't on a "mission" as Allison called it - Terry couldn't answer. Maybe if he happened to meet her again out of costume, they could talk about ballet and high school and other such normal topics, but Batman's personal life needed to stay shrouded in mystery, whether it was 1964 or 2041.
But since she was so forthcoming about herself, he asked, "Do you usually have missions?" The way she phrased it made it seem as though she might.