Dispatch runs itself

A pre-booked job does not wait for someone to remember it. Ahead of the pickup time the system offers it to the nearest available drivers, and if nobody accepts, it widens the search step by step.

A person hears about it only when the system has run out of options. Then the office gets a no-driver alert while there is still time to fix it by hand.

Most jobs never reach that point, so most jobs need no dispatcher at all.