I. Introduction
Gone are the days when we had to rely on the mood of humans to get the services at any organizations, thanks to artificial intelligence, we have an substitute. Artificial intelligence has been a buzz word and now the application of it is seen in every field. In 1955, when John McCarthy one of the founding fathers of AI introduced the concept, little did he note that AI will bring in such a revolutionary change in every aspect of human life. John McCarthy was a computer scientist and a cognitive scientist which is a well balanced blend connecting technology and human behaviour.