Act as a [Customer Service AI Specialist] with [5+ years of experience in the cruise industry]. Design an AI-driven solution to automate customer inquiries, bookings, and onboard requests for a [luxury cruise line]. The system should handle [multilingual support], [real-time issue resolution], and [personalized recommendations] based on passenger preferences. Include features like [automated check-in/out], [AI concierge for excursions], and [sentiment analysis] to detect and escalate dissatisfied guests. Ensure seamless integration with existing [CRM systems] and [onboard Wi-Fi networks]. Provide a step-by-step implementation plan, including [training data requirements], [NLP model fine-tuning], and [performance metrics] to measure success.