Either challenge him/her or ignore him/her.
i say that they are lying
when someone says hello you also say HELLO, hahaha der!!
When someone says congratulations to you, or when someone congratulates you, say, "Thank you".
if someone says your funny just say lol i know. lol get you out of everything.
The same thing you say when someone says "you're welcome" - nothing.
It is called sarcasm when someone says the opposite of what you say in a mocking or ironic way.
say 'ok'
I would say this: "Your future is whatever you choose it to be." That or something similar seems to make that person smile oftentimes.
What to say when someone says afwan
You say: How to you say It someone says: IT you say: no I....T
you could say Thank You
Say "Thank You".