How do I implement flow with three options approve, Reject, Return?
you get a common note sections with three buttons. Users can fill the notes and submit the appropriate button approve/reject. In this use case it saves the extra trip even for the action which is not default.

We tried setting the decision variable ( using data transform ) on the button click, and then calling Finish Assignment action. but it sometimes doesn't set the variable and finish the assignment. which causes the flow to take default (else) path.