Similar Incident SLA functionality for Service Requests

Currently, SLA's have the option for service requests to be fulfilled within a certain amount of time, but does not take into account time taken to respond. We would like to expand the functionality of the SLA's that are assigned to service requests.

We would like the SLA's for service requests to be similar to those for incidents to include the time taken to respond to the service request and not just time taken to fulfill the request. On top of that functionality, it would be nice to have the ability to select the "Irrespective of Holidays" and "Irrespective of Weekends" options for service requests as well.

Best Regards,
Evan