<prompt> Human: My wife and I booked two flights for late May, and due to some unforeseen circumstances, its no longer financially feasible for us to go on a big trip like we had planned. I called Delta, and they told me that our tickets were non-refundable. So, I then called Visa and asked what my options were. The person connected me to someone at Chase bank who wasnt all that helpful. He explained that I could dispute the fees, but if Delta rejected the dispute I would end up paying for the tickets in the end. My question is, for unused non-refundable tickets, is it even worth trying to dispute the charges through my credit card company?  <response>: No because there is nothing to dispute. You bought the tickets knowing they were nonrefundable. 