Request start date and End date determine based on Priority of service orde

Hi Experts,

We have the requirement like request start date and end date should determine based on priority of service order.

If service order priority is u201CVery highu201D request start date should be the current date +4 hours of the order creation date. High priority should be +24 hours for the request start of the order creation. Medium and Low use the default 72 hours.

Kindly provide the details how to map this requirement in system.

Regards

Srinivas