This collection is for the [Adding Extra Bags](https://duffel.com/docs/guides/adding-extra-bags) guide. # What do you need to start? This guide will go through the changes you need to make in the booking flow to be able to list and book services for any offer you want. It's important you know the basics of how to create a booking. If you are not familiar with how to create an order please heads over to our [Quick Start Guide](https://duffel.com/docs/guides/quick-start). This guide will start from an offer so make sure you grab an offer ID for a British Airways flight before we start. # Overview Baggages are a type of what we call available_services. Available services are specific to an offer but not surfaced through the API by default. The changes we'll make to work with available services are: 1. Retrieve an offer along with its available_services 2. Include services to order creation 3. See the services booked on an order

Versori has established itself as the third generation of Integration Platform as a Service (iPaaS). Versori builds custom integrations for its customers using an intuitive visual user interface.

Versori’s connector engine means there is no dependency on an existing library of apps, all you need to start is the documentation of the app or system you want to integrate to.