@Laura3187 On the subject of filling gaps created by cancelations, a couple of times I have put at the top of my listing description “**Rare cancellation - November 20-25 now available!**”. That has worked well for me.
Another thing I have done is use Airbnb’s Promotion feature. You can provide dates for the promotion, and if the discount is 20% or higher from your normal rate, Airbnb will feature your property in publications and emails to potential guests. They also provide a “strikethrough” display of the new price, crossing out the old price and displaying the new. This has also worked well for me. The only issue is that I think some people have had issues seeing the Promotion option in the most recent Summer release, but it may be just a glitch.