2001: A Space Odyssey (1968)

• Dave Bowman:  Hello, HAL. Do you read me, HAL?
• HAL-9000:  Affirmative, Dave. I read you.
• Dave Bowman:  Open the pod bay doors, HAL.
• HAL-9000:  I'm sorry, Dave. I'm afraid I can't do that.
• Dave Bowman:  What's the problem?
• HAL-9000:  I think you know what the problem is just as well as I do.
• Dave Bowman:  What are you talking about, HAL?
• HAL-9000:  This mission is too important for me to allow you to jeopardize it.
• Dave Bowman:  I don't know what you're talking about, HAL.
• HAL-9000:  I know that you and Frank were planning to disconnect me, and I'm afraid that's something I cannot allow to happen.
• Dave Bowman:  Where the hell'd you get that idea, HAL?
• HAL-9000:  Dave, although you took very thorough precautions in the pod against my hearing you, I could see your lips move.
• Dave Bowman:  Alright, HAL. I'll go in through the emergency airlock.
• HAL-9000:  Without your space helmet, Dave, you're going to find that rather difficult.
• Dave Bowman:  HAL, I won't argue with you anymore. Open the doors.
• HAL-9000:  Dave, this conversation can serve no purpose anymore. Goodbye.