Drawing from experience building over 50 chatbots across five continents, this case study outlines four crucial lessons for successful chatbot implementation. Key insights include treating chatbot projects as AI initiatives rather than traditional IT projects, anticipating out-of-scope queries through "99-intents", organizing intents hierarchically for more natural interactions, planning for unusual user expressions, and eliminating unhelpful "I don't understand" responses. The study emphasizes that successful chatbots require continuous optimization, aiming for 90-95% recognition rates for in-scope questions, while maintaining effective fallback mechanisms for edge cases.