A leaking water heater does not wait for business hours, and neither does the customer. We Got The Call answers the call your crew cannot, works out whether it is an emergency, and books the truck.
Plumbing is the trade where a missed call is most obviously a lost job. Water is already on the floor; the caller will not leave a voicemail and wait. They scroll to the next result and ring that number instead.
The calls that matter most arrive at the worst time, a Saturday night, a holiday weekend, the middle of a job where both hands are under a sink. That is exactly when a voicemail greeting costs you an emergency call-out rate.
The questions your dispatcher would ask, in the order they would ask them.