You cannot answer a phone with your hands in a panel, and a customer who smells burning will not wait. We Got The Call picks up, works out how urgent it really is, and books it.
Electrical work is the trade where you are least able to pick up: you are on a ladder, in a crawl space, or with the power off and both hands occupied. Every one of those hours is a missed-call window.
It is also the trade where the caller is worst at describing the problem. "The lights are doing something weird" could be a loose neutral or a failed bulb, and the difference decides whether a truck rolls tonight.
The questions your dispatcher would ask, in the order they would ask them.