On certain occasions, you may want to say more, or less, or nothing at all for a certain listing. For example, this may be the case because you don't want to activate Messaging for that special listing, or because you want to be able to send a very different message for just one or two listings.
You may do this at the Rule level.
When you are in the rule editor, just go to the "Additional settings" panel, head to the "Restrict to a listing" and select the listing or listings.
What will this mean?
Whenever Messaging has to do something (in Events, Reservations, or the Reviews flow), it will prioritize a rule restricted to the listing concerned: for example, if you receive an inquiry for that listing, or publish a review for that listing.