Revenue management is the process to maximize the profit by setting the optimal amounts of seats allocation to each class by composing marketing, operation and predicting customer behavior and study them altogether to sell the seats for the right time to the right people. Because each seat for every flight when the aircraft flown the seat is no longer can be sold they perishables very fast. In order to do this they need to find the right amount of seat by studying in the history of no-show behavior on the flight they operated. To avoid diversion from the high roller customer an airline need to set a right amount of restriction in order to prevent high roller customer from buying the lower option ticket class. Apparently there were typical 2 classes of customer to airline both are economy passenger and business class passengers they are distinctly different in term of willingness to pay and timing concern for economy class passenger they were not worry about the time but they do very sensitive to price of ticket. On the other hand business passengers mostly are worried about the time but they do not care about the price