Best Approach for a Personalized Clinic WhatsApp Bot in n8n

I’m building a WhatsApp chatbot in n8n for a clinic. The bot needs FAQ handling, appointment booking, rescheduling/cancellation, reminders, and personalization

I’m deciding between using a Switch node based workflow or the AI Agent node. My main goal is fast response time and a clean production design, but I also want the bot to feel personalized.

For those who have built something similar:

Is the Switch/Rules-based approach better for speed and reliability?
Does the AI Agent node make personalization easier enough to justify the extra latency?
For clinic use cases, would you keep booking/rescheduling outside the agent and use it only for FAQ or fallback?
Any best practices for storing personalization data and routing intents in n8n?

I’d like advice from people who have done this in production

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Best Approach for a Personalized Clinic WhatsApp Bot in n8n