I remember a kid would fly on a comet and visit a planet with a single rose that was alive it was a beautiful lady that he loved to talk to and that's all I remember help please.

The little prince maybe

I HAVE SEEN THAT MOVIE!
Is it Astro boy?

... or comet kid

So sorry! :( That was my little sis, she wasn't supposed to be on here, I don't know how correct that info is