@Mark3552 I think if your place is in such high demand that people are asking about wait lists, a new booking is bound to come along when you get a cancellation. But of course you can always use the original message thread from your inquiry when an opening comes up.
What you might suggest to your prospective guests is that they save all the listings they're interested in using the Wish List feature. Then, they can always input their desired travel dates and search for availability within that list. If your listing happens to be included on that list, it's a win-win situation.