Because she's polite, he is too, tapping his chest and bowing a little in a Ravager salute. Quick and only formal enough to get by. It's easier to meet respect with respect on the train. At home, he didn't care all that much what the hell people thought of him. (He did with some, but he'd deny it even to himself.) Were it not a mission situation, he might have asked her some personal questions related to her appearance.

But, anyway-

"Yeah, that's what I was thinkin'. It don't look like it's gonna be too rough though so... What duty you plannin' on goin' on yourself?" Because Yondu's probably going to bring some extra food and water because he's on recovery work. He's already going to pick some up. That way if someone's out wandering the wilds confused and dehydrated he can jam something to drink at them before they try to eat leaves or something.

Judging from his old crew this is a legitimate fear of what might happen to roaming fools.