Text mining system enables airlines to rapidly extract customer sentiments, preferences, and requests for example, when the airlines suffered from unprecedented levels of customer discontent in the wake of a February ice storm in 2007. Managers were concerned about their reputation degrading but there had been no means to glean their responses without text mining. Fortunately, they could make decisions and figure out a lot of measures to respond to customers’ discontent. The reason is that text mining facilitates gleaning from many unstructured text data and compiles them. This data wouldn’t be analyzed by decision making systems like MIS and DSS because text mining is not structured data. Text mining is indispensable for decision making of unstructured data. text mining improve in decition making by Offering unique insights into customer behaviour and attitudes.