Abstract: Chat Bot intend to build a discussion among both person and device. The can recognize the sentences and building a conclusion itself as reply to answer a query. The reaction standard is corresponding to the input sentence starting from user. It can match the similarity of sentences; the elevated score acquired extra analogous of reference sentences. The information of chat bot are accumulated in the database. The database has been working as information storage and performer has been working as accumulated programs of function and process fixed for pattern- matching condition. The interface is standalone which has been built using programming language of Java.

Keywords: Natural Language Processing, ChatBot, Sentiment Analysis, Word Net, Word Order Similarity between Sentences.