Hey there,
Regarding your questions my own interpretation is that the 'Basic Flow' of 'Pay for Itinerary' commences just after the user has selected which itinerary to pay for. In 'Award Travel' they take one step back from this. Yes, it is confusing. They are deliberately trying to be confusing!
Regarding 'Award Travel'
you should see my previous post for an answer to this:
https://coderanch.com/forums/f-26/java-Architect-SCEA I believe that "Customer selects award travel" means they actually click the button to execute this. In other words, the web page will have 2 buttons, one saying 'Pay with Card' and the other saying 'Award Travel'.
John