This can certainly happen and is not a problem at all. The easiest way would certainly be to postpone the planned date to an alternative date. But just talk to your callboy. He will propose a fair solution to regulation. If you don't want to make an alternative date, this is not a problem at all. If costs have already been incurred for the callboy, for example for booked flights or tickets, a settlement with the already paid deposit seems to us to be a good and fair proposal for both sides.