Originally Posted by FlyerGoldII

I just got the answer.

The SE reservations agent had booked Z class fare, both on AC and on LX. She had forgotten the a given booking code on one airline may not be the same booking code on the second airline. A "Z" booking code on AC is equal to a "J" booking code on LX. With this change (from "Z" on LX to "J" on LX), the fare did come out to $4580.

Does the KVS tool have a mechanism of converting a booking code on one airline (eg AC) to a second booking code on the second airline (with this fare basis, 5 other airlines, besides AC, can be used)?