Hello! I have a question? I rent my home for spring,summer,fall in the beautiful Adirondacks NY. We also have renters who rent from us from December 1st - April 1st. So I thought I blocked off those dates for the previous year. Then those dates were available cause someone booked in February and I had to cancel that booking. I got charged $50 for that. How to I keep it booked for every year so no one can book those winter dates. Thank you!