Advancement in technology makes this world a global village. People are connected with one another through social networks or they engage in online hiring or purchasing of products. This makes a drastic change in our industrial working patterns. Today?s market change from service oriented to customer oriented. For this purpose individual first have to look at reviews or user?s opinion about a product, customer?s feedback helps them in hiring or purchasing. Sentiment analysis or opinion mining plays a significant role in decision making process, as this analysis is being used to analyze user?s feeling, attitude and emotional attraction towards a product, social networks or it could be any article or blog. People?s attitude/reviews towards a product could be categorized as negative, positive or neutral. In this research work will mine these customer?s attitudes/opinions/reviews by using machine learning mechanism which helps to enhance the decision making process in order to categorize individual?s attitude in future.