That's not exactly the reaction he expected. He can't really decipher it - surprise, maybe? He'd like to think he's that handsome, but even Bucky's ego isn't that bad. Then there's the name - Steve hasn't called him James once in his entire life, and that generally includes introducing him to other people. Maybe it was Clint? Doesn't really matter, does it?

"Yeah." He replies, giving her a half-smile. "Bucky's fine. I was startin' to think we'd miss each other but Steve was right - you're pretty hard to miss."