/lit/ - Literature

Anyone recall a old book about half-elf girl becoming dragon rider and fighting Dark Lord? I read it like fifteen years ago. It starts of with her living in a city that's all inside just one big tower. Her dad is a blacksmith. He gives her dagger/sword one day. Some new guy shows up and challenges her to a duel with the dagger as bet. He uses magic to win and the protagonists feels cheated, so she follows him to a forest and becomes student of a sorceress, who is also the guy's teacher. Then the Dark Lord attacks and everyone fuck off to like capital city, where the protagonists joins fighter academics or something.