Clint would argue that Lucky was not exceptionally polite, seeing that he was begging strangers for slices of pizza like some kind of lowly pizza dog, instead of waiting by the door to a nearby coffee shop like he'd told him to.
Well, it wasn't like Lucky couldn't handle himself, he figured. It just was what it was. "Oh hey," he said, and it wasn't particularly clear if he'd said it to the dog or to the man. Sometimes Clint just liked to get his words out there.
"Yeah," he agreed, coffee in hand and eyebrow raised slightly at Lucky who was inching ever closer to that pizza slice. "That's Lucky. If you're not careful, that pizza'll be his, y'know. Sorry if he's a bother, he just gets excited."