Originally Posted by
aktchi
Question: If I purchase an award ticket with miles, and nonrev quota opens up later, will it be ok for me to cancel my award and for him to switch to the nonrev ticket?
In addition to what others have said, there is no such thing as a "nonrev quota" that might open up. Nonrevs get whatever happens to be left over each flight at or towards the end of boarding. There is never any quota of seats set aside for them in advance (if that is what you meant).
If it is important that this family member get there, buy a revenue ticket.