What should we say to extraterrestrials who ask?

Here’s the premise for the question: an alien society has made contact with the people of the earth. Someone (you were not consulted) has decided to respond to their question: What information do you have that would be of value to us?

For reasons I cannot comprehend, they come to you for advice on what we should respond. You are not the only one who is asked, and if you decline to lend your voice, they will just move on to someone else.

What would you advise?