Zuko: What are you doing here, Uncle?
Iroh: Same as you. Getting ready to embark on what is sure to be a memorable journey.
Zuko: You wanna come with me?
Iroh: I've come fully prepared. All the tea I need.
Zuko: I don't need a babysitter.
Iroh: How about a friend?
Zuko: My father made it very clear that I'm not to return until I find the Avatar... which means it could be a very long time before we return home.
Iroh: Home. Everything I need is on this boat. Like I said, all the tea I need, hmm?