[Dave can only stare with his mouth a bit open as Hiccup tells his story. He hasn't expected such a sudden info dump. It's not a bad thing, but still... wow. It makes him feel guilty for complaining about his much simpler life.

And what is he supposed to say to that? All his words feel insignificant.]

Hiccup... I'm sorry you lost all that. I wish... I wish any sorcerer would've known about you to help you wake up. [He rubs the back of his neck.] I know it's not much but... we can try tracking down your family line. It's gonna be difficult after all these years but... [A shrug. He really feels like he has nothing, ugh.]