Hello, all. I'm currently on hold in the queue with Flying Blue for the third time. They sure are busy!

My issue is that my husband and I are traveling DEN-CDG-ARN next week. Our adult daughter is also on the reservation, but her work situation has changed and she isn't going to go. If I can't get through the Flying Blue on the phone, do you think it would work to simply cancel her ticket when we check in at the Denver Airport?

The reason I don't want to try and do it through either messenger or Twitter DM is that I don't want to run the risk of all three tickets getting cancelled by mistake. I just need to cancel hers.

Thoughts? Thanks for your help!