Vader: Your destiny lies with me, Skywalker. Ob1 knew this to be true.
Luke: No!
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Lando:The security code has been changed!
3po:R2, you can tell the computer to override the security system.
Lando:Attention! This is lando Calrissian. The Empire has taken control of the city. I advise everyone to leave before more Imperial troops arrive.
This way.
R2:Yeeeeooooww!
3po:Don't blame me. I'm an interpreter. I'm not supposed to know a power socket from a computer terminal.
What are you talking about? We're not intersted in the hyperdrive on the Millennium Falcon. It's fixed! Just open the door, you stupid lump.
(3PO Talks a Lot in this part of the film IMO.)