Even better is, we casually drop the "Comment" and add the accent of a question instead, so it can go like : "Ça va?" "Ça va."
Note that in French we can make the meaning of it vary from roughly 'not great' to 'good' just by how enthusiastic we are. It's really only when we want to express radical emotions that we might stop using it.
(Although someone depressed might not want to express their distress and use it like the expressions in this meme..)