The use of ellipsis/omission was used to say the conversation is not closed...

Omission is used to NOT SAY something. Instead of relying on people interpreting your omissions and effectively CLOSING THE CONVERSATION, maybe make your thought clear, concise, and conclusive, or COMPLETE.

I used ellipsis/omission to IMPLY the conversation was not closed.

That wasn't hard, it takes a little effort to be specific and correct, to mean what you say, and say what you mean.