He'd probably have rolled his eyes if he'd seen her jerk her head. As it is, he simply makes his way to the filing cabinet first, keeping low so as not to entice anybody to look their direction.

One of the first things he'd liberated from his trenchcoat during his first mission was his actual lockpick set. Makes life much easier when trying to break into things quickly.

As long as it's an absolutely normal lock, he should make short work of it, popping the drawer open as quietly as he can manage.