Hi there - you dont seem to have a live listing so it's a bit of a moot point and makes it very difficult for other hosts to review. In addition, I cannot see the review you mention - so it is probably hidden away as it is not representative of your place overall.
AirBnB will not remove comments that are factual or even their personal view. I would move on - but if you feel like a public reply is required, then consider very carefully what you say. Be friendly and professional along the lines of: It was lovely to meet you and really pleased you decided at last minute that the awful weather was not going to stop you travelling - unfortunately given the heavy snow, keeping all areas fully clear was an impossible task.