This article explains how to update the booking class to business.
Step-by-step guide
By default, all the bookings are sent in economy class.
In case for some position you want to change the call to business you need to do the following:
Submit the booking in Adonis. The booking status will be New_Request.
Then open the Crewlink embedded window.
Click Change Itinerary.
Change the booking class and save the issues.