[Goten blinks slowly. That wasn't the kind of wish he was expecting. If anything, he's a pretty basic child. With no memories of his own, his 'family' focus is mostly what he has here. He does feel for Nanako but it doesn't make him sad about what he does or doesn't have. Acutally...]

Yeah! Izumo's right. I bet your dad is fine.

[He perks up and smiles before floating over so he can fly next to her now]

Hey, I know, Nanako! I'll use my wish for your dad to be okay and stuff too! Then it's gotta come true. Double true!

[That's how wishes work right? There's plenty of tasty things to eat, so he can save his food wish for next Tanabata]