Sequence with conditional nodes in OWL

I want to represent a sequence of action in OWL using protege. What I want to be able to represent is statement like : "if this action is true, then the next action is X. If it's false, then the next action is Y". Also I can have several condition in the same sequence of action.

For the moment I can represent simple sequence of action but I can't manage to add those conditionnal nodes.

Example of what I'm doing now :

:seq1step1 :hasAction :SayHello ;
           :hasNextStep :seq1step2 .

:seq1step2 :hasAction :GiveYourName ;
           :hasNextStep :seq1step3 .

:seq1step3 :hasAction :SayGoodbye ;

I tried to add a property "hasNextStepIfTrue" but then I can't manage to make a Sparql query to get the full sequence because an individual can have the property hasNextStep or also hasNextStepIfTrue so I always end with only a part of the total sequence.

Maybe it is possible to query the full sequence in SPARQL but I can't find how.

Here is a screen of OntoGraf in protege to show what I want to represent.

Thank you !