1. A system comprises: one or more computer systems, each of the one or more systems comprising: a processor; and memory coupled to the processor, the memory storing: an availability predictor program that produces a predicted answer of seating availability on an airline flight, the predicted answer being a prediction of an answer that would be provided from an airline revenue management system associated with the airline flight; a revenue management program that produces in response to an availability query an actual availability response for a flight; and decision logic that compares the predicted answer from the availability predictor and the actual availability response from the revenue management system, to produce a decision that determines whether the actual availability response from the revenue management system should be modified.