Airbnb claims that you are never penalized for declining a guest. It does however ask for a reason ( point and click) so I do wonder whether if your reason is that the calender was not up to date for example, that it might start changing you place in the listings, but have no specific proof of this. I try to keep my calender current to avoid having to not accept for this reason, as well of course a s courtesy to travelers. Regards and good luck
ps not that you were asking, but I always advise new hosts to start out with a lower price for the first few months, as a good way to get some reviews under your belt. In the long run it is an inevestment, and also an empty house/chalet brings in nothing, so half price is better than that. You can even put that in your listing heading " New listing, introductory bargain rate" and of course set specifc prices for specific days in the manage your calender section. Good luck and hoping for snow