Dear Deirdre,

We hope you enjoyed your trip to Glasgow, and would love to hear your feedback

Heh.

How about: gee, thanks for marking my ticket not only as non-refundable, but also as non-changeable even though that was not a requirement of that fare code? This created sufficient hassle that an Embassy official had to be on hold for 40 minutes to handle your screwup.

I’ll have to think of something pithy.