The Chief's reply to Sombra - Azúcar - is to tilt his head. He can't figure out what she means.

"Cortana?" he asks, though whether he's asking Sombra or Cortana herself isn't quite clear. Perhaps both. It's blunt, but not harsh the way he was with the tech just now. The Chief is a difficult person to read, though to Cortana his concern is clear in every line of how he stands.