Tesater whatsapp meta bot ai

Prompt

I have an ecommerce WhatsApp bot using Meta WhatsApp Cloud API. I want customers to be able to type naturally: "show my orders" "I want to return something" "what returns have I made before?" "where is my latest order?" The bot should identify the customer from their WhatsApp number, fetch the relevant data from my existing backend/database, and use WhatsApp interactive lists/buttons to let them select orders, items, and return reasons. Design the complete flow from WhatsApp message → webhook → backend → database → WhatsApp response, including how you would handle customer authentication, order/return queries, conversation state, and security.