Not Funny

This is my least favorite work joke. I've just finished being helpful, or doing something for somebody that they really should have done themselves, and somebody says to me, "I don't care what they say, you're the best."

What am I supposed to say to that?
"Who's they, and what have they been saying?"
"Give me names and we'll go kick some ass."
"Tee hee. You're silly!"
"Luckily it's your opinion that really counts."

And when we're within 30 days of just laying off a bunch of people the joke loses the last semblance of fun it may have had.