If you get out of the ASC (change fee) on this, you will be lucky. The very nature of "push back for some personal reasons" is why they charge change fees to begin with.
I have had change fees waived on pilots strike, IROPS, and wanted to change a return after they preformed miserable on the outbound (definitely a favor type of waiver).
As others said, wait for a change on their part to get the change you want....really even then it will be better to talk them into a refund a rebuy.