I feel like it’s best to ease people into illusionism rather than hit them with a statement like “consciousness isn’t real”, which they will almost certainly misunderstand and reject if they aren’t versed in the philosophy of mind (hence why it works well for this thread). As a teaser, I like the statement, “You are conscious, but not in the way you think you are”, i.e. their consciousness is not phenomenal in character. What that means exactly is a lengthy discussion, but it gives an opportunity to emphasize the aspects of consciousness that actually matter and to potentially offset things like moral status over to them. For most people, morality hinges on phenomenality, so you have to replace it with something before they can accept illusionism (in my opinion).