Bruce had been moving between groups and checking in on individuals while keeping a distanced eye on others. But he noticed Talia when he arrived and it had been awhile. When he had called her office weeks ago, she had been off with her 'parents'. If that didn't make him suspicious, what else would?
Bruce nodded to Alfred as he passed him. Moving behind Talia, he placed his hand on the small of her back to get her attention. He smiled at her conversation companions. "If I may, I must say that I need to speak to this woman right away. I'm sure you won't mind if I steal her away for a moment?"
Not that Bruce Wayne ever needed anyone's permission. The tone in his voice suggested that Talia might not even have a choice in the matter herself.