This looks to be like a form of dementia. You do realize how normal conversation work right?
You say something (convey some sort of thought or idea) then the other person says something that either indicates this was a useful topic for conversation by talking more on the issue, or gently tries to either change the subject or or speaks in a way that indicates lack of interest. At that stage of the game, you can continue to talk about it and become annoying, or find a person/place with simular interests.
I don't know what saying HELLO???? for days on end is supposed bring about. Is something troubleing you?