@Thomas669 Ugh, I hate when they do that. Just say no! And keep saying it, over and over, as they pressure you to reconsider. Here's an exchange I had last summer:
Airbnb CS: "We do understand that it is your right to uphold your strict cancellation policy but in the spirit of Airbnb, we would really appreciate if you take the time to reconsider your decision."
Me: "As a Superhost, I take meticulous care to abide by all of Airbnb’s Terms of Service. It is my clear understanding that if I were to breach any of my obligations of the Terms of Service, I would be shut down by Airbnb. I am therefore somewhat shocked that a representative of Airbnb would ask me to breach a Term of Service (clause 9.2) in this manner. It flies in the face of the mutual respect that is at the heart of the spirit of Airbnb."
They actually tried one more time and I simply copy/pasted my previous reply. They finally left me alone and the poor sod had to pay up.
Also - the guest really annoyed me by trying to game the system by changing the date of his reservation and then cancelling the next morning, clearly under the impression that he was cancelling within the 48-hour period - but Airbnb uses the original booking date. On top of that the guy had effectively blocked two weekends in high season with his shenanigans. So a refund was a non-starter all around.