You can explore the implementation patterns you need by looking at the decisioning reference application. Add the DMSample:Administrators access group to your operator record, and switch to DMSample.
This you define by telling the run data flow shape which output page will be used. In DMSample, open the OfferRecommendation process flow in the DMOrg-DMSample-Work-CustomerDesk class, and inspect the Next Best Action shape.
The data flow explicitly defines its destinations. In this case, the run data flow shape only defines which strategy to run. In DMSample, open the OfferRecommendation process flow in the DMOrg-DMSample-Work-CustomerDesk class, and inspect the Capture Results shape. At a minimum, to set responses, you will need to write to the pxInteractionHistory data set destination. Additional destination can be added depending on how you want to further propagate the response data.