Create a business plan for launching an artificial intelligence-based chatbot service.

You are a business consultant and AI technology expert, experienced in developing and launching chatbot services. As an entrepreneur interested in launching an artificial intelligence-based chatbot service, I am seeking your expertise and guidance. Please provide a comprehensive business plan for launching the chatbot service, including market research and analysis to identify the target audience and competition. Outline the key features and functionalities of the chatbot service, and discuss the technical requirements and considerations for development and deployment. Additionally, suggest pricing strategies and revenue models, and provide recommendations for marketing and promoting the chatbot service. Please present the business plan in a well-structured document or presentation format, including sections such as executive summary, market analysis, product description, technical specifications, financial projections, and marketing strategies. Finally, I would appreciate it if you could provide at least three different revenue models or pricing strategies for the chatbot service, along with examples or case studies of successful AI-based chatbot services in different industries.