我在网上查询了航班的可预订情况，选择很多。

I checked the ___availability of flights online and there's plenty of choice.

因此，您在预订行程时，务必考虑我的时间安排是否方便。

Therefore, it is essential that you take account of my ___availability when booking the trip.

酒店确认了我们入住日期有空余的双人间。

The hotel confirmed the ___availability of a double room for our dates.