Yesterday I cancelled three round trip tickets (self, wife, son) and got a credit. I'd like to apply this credit to two tickets next month (self and wife only).

How do I reuse the credit? Enter the confirmation number and start making changes in continental.com?

Admission of idiocy: the reason for the cancellation was we went to the WRONG airport and no rebooking was possible because all the planes were 100% sold out. Totally my fault. So mortified.

I apologize if this has already been discussed a hundred times - search didn't turn up anything for me.