Princess Leia Organa : General Kenobi. Years ago you served my father in the Clone Wars. Now he begs you to help him in his struggle against the Empire. I regret that I am unable to present my father's request to you in person, but my ship has fallen under attack, and I'm afraid my mission to bring you to Alderaan has failed. I have placed information vital to the survival of the Rebellion into the memory systems of this R2 unit. My father will know how to retrieve it. You must see this droid safely delivered to him on Alderaan. This is our most desperate hour. Help me, Obi-Wan Kenobi. You're my only hope.
Ben Obi-Wan Kenobi : You must learn the ways of the Force, if you're to come with me to Alderaan.
Luke Skywalker : Alderaan? I'm not going to Alderaan, I've gotta get home, it's late, I'm in for it as it is!
Ben Obi-Wan Kenobi : I need your help, Luke. She needs your help. I'm getting too old for this sort of thing.
Luke Skywalker : Look, I can't get involved. I've got work to do. It's not that I like the Empire; I hate it, but there's nothing I can do about it right now... It's all such a long way from here.
Ben Obi-Wan Kenobi : That's your uncle talking.
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From: Star Wars: Episode IV - A New Hope