General :: Assign Preferred Days Of Week When Volunteer Want To Work

I created a database for an organization I volunteer for but I am running into design problems. I want the database to be able to assign preferred days of the week (that the volunteers want to serve) with the flexibility to change them.

The problem is in order to be able to keep my reporting options flexible. I will have to write a record (on a separate table) for each volunteer for every day they want to serve. A one to many relationship between the volunteer table and preferred days table.