Darth Vader: Obi-Wan never told you what happened to your father.
Luke Skywalker: He told me enough! He told me you killed him!
Darth Vader: No. I am your father!
Yoda: That place is strong with the dark side of the force. In you must go.
Luke Skywalker: What's in there?
Yoda: Only what you take with you.
Echo Base Officer: Your Tauntaun will freeze before you reach the first marker!
Han Solo: Then I'll see you in hell!
Yoda: How you get so big eating food of this kind?
Luke Skywalker: I'm not looking for a friend! I'm looking for a Jedi master!
Yoda: Oh, Jedi master. Yoda. You seek Yoda.
Darth Vader: You have learned much, young one.
Luke: You'll find I'm full of surprises!
Princess Leia: Why you half-witted, stuck up, scruffy looking...NERFHERDER!
Han Solo: Who's scruffy looking?
Princess Leia: I love you.
Han Solo: I know.
Princess Leia: I'd as soon kiss a wookie!
Han Solo: I can arrange that!
Luke Skywalker: I'm not afraid.
Yoda: You will be.
Luke Skywalker: I don't believe it.
Yoda: That is why you fail.
Answer: Star Wars being for the young and the young at heart, Han and Leia's relationship unfolds in a deliberately childish manner that kids can relate to and adults will find comedic. Leia is irritated at herself for her attraction to Han, and certainly unamused that Han teases her over it, while at the same time he is not brave enough to admit his own feelings, either.
TonyPH