A: United shouldn’t have canceled your return trip. You were on the outbound flight to Washington. You had a round-trip ticket. You should have been able to fly home. End of story.

Unfortunately, that’s not what happened. You recall some confusion at the gate, and United did not have a record of you on your outbound flight. Canceling the return is a normal — and understandable — industrywide policy. If you miss your outbound flight, an airline assumes your seat will fly empty on the return as well. Canceling the ticket allows the airline to resell the seat.

When you told United that you were on the flight to Washington and offered to show it proof, it should have been an easy fix. But the system isn’t set up like that. After an automatic cancellation, your seat is released into the airline’s inventory, and you need to go through the booking process again. A $200 change fee is a given. Never mind that these change fees are nothing more than a money grab. (Does it cost the airline $200 to change a ticket? No.)

It’s not clear why United insisted on charging you again and then asked you to go through the refund process. That’s probably a function of its accounting system, as opposed to the way it would handle customer service. I imagine there are United employees who would have wanted to fix this, but their hands were tied.

But remember, there’s always someone higher up the chain of command who can make an exception. I list their names, numbers and email addresses on my consumer-advocacy website: www.elliott.org/company-contacts/united-airlines.

I contacted the airline on your behalf, and it refunded the $200 and credited your miles.

Christopher Elliott is the ombudsman for National Geographic Traveler magazine and the author of “How to Be the World’s Smartest Traveler.” You can read more travel tips on his blog, elliott.org, or email him at chris@elliott.org.