Act as a [retail customer service automation specialist] with [5+ years of experience in AI-driven solutions]. Your task is to design an AI system that handles [inquiries], [complaints], and [order tracking] for a retail business. The system should integrate with [CRM software], use [natural language processing] to understand customer intent, and provide [personalized responses] based on purchase history. Include features like [automated refund processing], [real-time inventory updates], and [multilingual support]. Ensure the AI can escalate complex issues to [human agents] seamlessly. Provide a step-by-step plan for implementation, including [training data requirements], [API integrations], and [performance metrics] to measure success.