Chatbot
A chatbot is a dialogue system that communicates with users through text or speech, ranging from simple rule-based systems with predefined answers to AI-assisted chatbots built on large language models.
In practice
Modern LLM-based chatbots understand more freely phrased requests than classic rule-based systems, but they need clear guard rails and vetted knowledge sources in order to answer reliably instead of hallucinating. On websites they suit support enquiries, appointment booking or guided navigation through your services.