My sister is a musician, and when she flies, she buys a seat for her instrument. She says that the airline invariably tries to sell the seat her instrument is

My sister is a musician, and when she flies, she buys a seat for her instrument. She says that the airline invariably tries to sell the seat her instrument is in and check the instrument[1]. She also gets bumped to a later flight regularly because bumping one person is cheaper for the airline than bumping two people. 1: At first she got kicked off of airplanes for refusing to gate-check her instrument, even when she had a ticket for it. Switching tactics to "Give me something in writing that it is insured by the airline for $XX XXX" and you can have it fixed that problem because she wasn't saying "no" anymore.