My point is, you roleplay a warrior with a shield and an axe, you have no experience at using a bow, will you suddenly start shooting him with a bow (you might not have a bow) and just ignore the fact you're no archer at all?
That depends very much on the individual playing. If they are roleplaying strictly as a warrior without any experience with ranged combat then they may have a little trouble, but as others have said the next best thing would be to run for cover and force the dragon down. They may also land randomly so maybe with a bit of luck you can defeat the dragon like that.
Personally I'll be playing a Nord "asgardian warrior" type of character but will most likely invest in a little bit of ranged capabilities of some sort, basically either magic or bows, probably a little of both. My main focus will of course be on melee, and I'll likely try to stick to a certain weapon so I'm really skilled with it.