If I understant what you want what you need to do is like @tbhavnani said, create different stories. I mean in your stories file you do something like:
#story1
*greet
-utter_greet
*want_car
-utter_want_car
*confirm
- first_question
* confirm
- second_question
......
and then other stories were you treat other cases
#story2
*greet
-utter_greet
*want_car
-utter_want_car
*deny
- first_question_if_deny
* user_respond
- second_question
and other stories
#story1
*greet
-utter_greet
*want_car
-utter_want_car
*confirm
- first_question
* deny
- second_question_if_deny
The bot will follow the story and so he will know that the second yes need a response with the second question