Sure Akshay, i can guide you for match script but My concern is why it is not applicable with match style.
If you will select match style as signature, it will validate the operation name and arguments both. So, If request has argument segRef_2 , then it will select corresponding response and vise versa.
I don't see any issue in this.
Please share the screenshot on my email id: monika.mehta08@gmail.com
I can guide you more on that.
Regards,
Monika Mehta