can't say I didn't try

Department Receptionist: ...and don't forget you have the XYZ conference all day Friday.
Me: No thank you.
DR: What's that?
Me: I said, no thank you.
DR: Do you think you're going to get out of this by being courteous?
Me: Maybe?
DR: Sorry, no.
Me: It's too cold.
DR: To be at a conference that's indoors?
Me: Yes.
DR: I don't think so.
Me: I have jury duty again?
DR: See you Friday!