Booking with Cart Items

I am writing to request a new feature for your widget to support a 'Boutique Booking' workflow. Currently, my shop operates on an appointment-only model where customers add multiple dresses to their cart and then schedule a single fitting session to try them all on. I need a feature that allows the booking button on the cart page to automatically capture all current line items (product titles and quantities) from the Shopify Cart object and attach them to the booking reservation. It is essential that when a customer confirms their appointment date on the calendar, this full list of cart items is automatically included in the notification email sent to my Gmail, allowing me to prepare the specific dresses in advance without the customer needing to go through the standard Shopify checkout.