It depends on what the potential tenant wants. If they ask us to unblock the reservation fee after the 24-hour period is over, then the reservation request is rejected (i.e., it is counted as one of your 3 unauthorized rejections). However, the tenant may be very interested in your flat and so wish to extend the time limit. Then we will ask you again to accept or decline.
We recommend that you decide to accept or decline each reservation request as quickly as possible. The longer a person waits for your decision, the more likely it is they will look for an alternative offer.