In the history of computer science (MIT), It is known to be the first chatbot created by Joseph Weizenbaum at the Massachusetts Institute of Technology. However, the word 'Chatterbot' was coined in 1966. Therefore, when talking about Eliza; ELIZA works to replicate an answer using certain keywords from pre-programmed responses by identifying key terms or phrases from the input.
Let’s take an example; when a user says “I like sweets more”, Eliza picks up the word “sweets”, and will start questioning like “which of the top picks of chocolate do you like the most?”. Therefore, it creates a sense of user credibility and feels like a human being and not any virtual assistant.