Recording an action that won't need user input during replay

I find myself regularly selecting the subject, saying that selection then inverting and saving the background.  I usually just assign the digits 1 and 2 to the forground (subject) and background.  If I record this as an action I get asked to ype each of the digits (names) for the selections.  I'd relaly like to automate this as much as possible. Is there a way to get these names included when I record (or edit) the action?

Many thanks,