Does this conversation/exchange of words make sense?
"你快乐吗?" sounds normal enough

"我常常是" sounds too 'English' . Native Chinese would reply: "我常常都很快乐"

"有意思" sounds normal enough, but it implies the answer is somewhat unexpected

The last line has the most problem:


  "你没有不对" means "you didn't do anything wrong" 


For "you are not wrong" in this context, native Chinese would say: " 你说得对" or "你说得没错". Both mean "you are right"