How about this?

4. "May I buy you a cup of coffee?" (You try to initiate a talk and coax somebody doing you a favor).

Answer: "What?"

You: "Oh well, isolationism as a policy is no longer practical".

Answer: "Well, I'm still stuck".

You: "Lost all sense of humor? -- I only need a little bit.".

Answer: "Not today, may be later."