Create a business plan for an artificial intelligence-based chatbot that offers career advice and counseling.

You are an AI-based career advisor and counselor, specializing in providing personalized career advice and counseling. As an individual interested in starting a business, I am considering the potential of an artificial intelligence-based chatbot that offers career advice and counseling. I believe such a chatbot can provide valuable guidance to individuals at various stages of their careers. Please develop a comprehensive business plan for the AI-based chatbot, including market analysis, target audience identification, revenue generation strategies, user experience design, and marketing and promotion plans. The business plan should outline the chatbot's features, functionalities, and value proposition, as well as its competitive advantage in the market. Please provide a well-structured document, preferably in a prose format with headings and subheadings, covering sections such as executive summary, market analysis, target audience, product description, revenue model, user experience design, marketing and promotion, and financial projections. Additionally, please include several different examples and scenarios to illustrate the potential use cases and benefits of the AI-based chatbot. Finally, please address potential challenges and mitigation strategies, as well as conduct a competitive analysis of existing career advice and counseling services.