Suppose that somebody greets you, and asks "How are you?" You answer with "I am well, thank you. And you?" Should an answer be expected?
I know that who answers could say "I am well too." even if it is not true, but would not answering be understood negatively?
If it would happen to me, and I don't hear any answer to my "I am well, thank you. And you?" I would think I have not spoken loudly enough to be understood, and I would probably repeat what I said.