"- No sir, I cannot use those flights, I can only use segments that the system gives me. This is totally impossible."
"- So you cannot use flight QRxxx and QRxxx even if that makes for a long layover?"
"- Unpossible."
"- What if I say I would like to use QR's offer of a "Doha stopover", your offer says the minimum stopover is 12 hours, then what?"
"- *sigh* then you can have the flights you wanted."
From a random recent interaction. Some of this stuff can't be made up.