re-instate cancelled reservations

Hi, I mentioned this to Tim a long time ago. 

Sometimes after a court closure cancels a reservation, the condition causing the closure passes. An example would be a closure due to rain but then the rain stops and the court is playable again. Meanwhile all the reservations for that court have been cancelled. It would be nice if the system, which has all the reservation data, would be able to re-instate the reservations remaining once the court is reopened and send an email alerting members that their time slot is still reserved.