Sentimental Analysis is that particular domain ,where you try to understand human emotions with the help of a software.Human emotions are in written form and we can classify those sentiments as positive,negative and neutral.Sentimental analysis is also referred to as opinion mining because in sentimental analysis we are trying to analyze the thoughts of a customer with respect to a particular thing.

Keywords : Chatbot, Lexicon, Machine Learning, polarity, subjectivity, tokenization.