He forgot one thing

This knight is well prepared for fighting a dragon but he forgot one thing: FIRE. Not all dragons have it but you do.

Ferwoosh

You breathe fire in his general direction. His light armour allows him to dodge but he loses his footing because of the weight of the poleaxe. It clatters to the ground and he is on his back.

Ferwoosh

another breath of flame and the Knight is engulfed. The smell of roast flesh and burnt metal and cloth fill your sensitive nostrils. You peal the corps out of the chain mail. 'This one will not be claiming your princess' you think to yourself. You enjoy a breakfast of burnt knight, can't let the meat go to waste breathing fire also burns your own energy. You lie back down to recover from the fight.

Alisa comes over. "What is that foul smell?"She asks

"The knight was not so lucky." you inform her as you take the poleaxe and brake it, you don't want others to use it against you. Then you move what is left of the chain mail to the waste pile along with what was left from last nights feast. Alisa had already harvested the edible remains and made breakfast from leftovers.

"After earlier, I don't think I want a knight." She informs you as she cresses your muzzle.

"Now, my dear, that was to show you what it is like. However, I did enjoy it and if knights continue to fail I would mind doing it again. But it took more out of me than I expected and I could have lost just now if the knight had been a bit better prepared." You inform her.

"I don't want you to die, why do you have to fight knights, can't we just be together." she proclaims, kissing your snout.

"I don't want to die either, but they will keep coming, I could propose a more peaceful solution to the next one but if he doesn't take it then it will be kill or be killed." you conclude.

Alisa goes back to her tower.