Bad Business
Why does it have to be one or the other?
A successful business does everything it can to accommodate its customers. A boster seat was on hand but didn't fit the seat. Does it fit in a first class seat?
Any management person should forsee this problem and have a booster seat stored at the terminal. No? Odds are somebody at the terminal has one. Borrow one or take $500 out of the till and buy one.
Rule one. Solve the customer's problem. If it costs a few dollars, it's money well spent. And when your work force applies this principle, back em up!