Function Calling Voice AI

const functions = [{
  name: "get_order_status",
  description: "Retrieve the current status of a customer order. Use when customer asks about their order, delivery, or shipment.",
  parameters: {
    type: "object",
    properties: {
      order_id: {
        type: "string",
        description: "Order ID (format: ORD-XXXXX or just the numbers)"
      },
      customer_email: {
        type: "string",
        description: "Customer email for verification (optional)"
      }
    },
    required: ["order_id"]
  }
}];

// Handler function
async function get_order_status({ order_id, customer_email }) {
  try {
    const order = await db.orders.findOne({
      id: normalizeOrderId(order_id)
    });

    if (!order) {
      return { error: "Order not found", suggestion: "verify_order_id" };
    }

    return {
      status: order.status,
      estimated_delivery: order.eta,
      tracking_number: order.tracking,
      last_update: order.updated_at
    };
  } catch (error) {
    return { error: "System temporarily unavailable" };
  }
}