visitors registration request or assigned to a user

Hi, I have a problem.
Visitors on my website can leave comments without registration, just provide name and email.

There is only two options in Q&A settings:
"He is asked for registration" and "Question is assigned to a user".
I can create a Guest user and assign all questions to him, but what if someone want to have his name and be informed by email about answers? Is there any possibility to create an option like in WP?
Just email and name, no registration?

Thanks a lot!
Ruslan Seyidov