Originally Posted by
findark
There should never be a fee to cancel a ticket, so I'm not quite sure what you are trying to do. Refund the ticket? Change to a different flight?
It's not clear, but I'm assuming that the OP is trying to change the travel dates, so this would be a rebooking.
BTW I'm also implicitly assuming that OP purchased the ticket directly through DL so that there aren't any additional OLTA service fees.