Assign different service patterns to Staff in Bookings

Hello!

I wonder if someone can help me work out if this is possible or not!

We have a Bookings system that say we have Service 1 that can be booked from Monday through to Friday by anyone with various members of staff.

However, I have a member of staff who only works for this service, parttime and therefore is not available for Service 1 on say a Monday and Tuesday.

BUT they do still work with different services on those days, so I cannot restrict their working days via the Edit Staff option as they should still be available for other services.

Is there a way I can restrict Service 1 for that member of staff only? So that it is only available for them on a Wed-Fri?  I do not want to have to create separate Services for members of staff if it can be helped. But I also cannot see a way to select when services can be made available for specific members of staff.

TIA!