I'd like to send different response emails from Contact Form 7 depending on user input

I'm setting up a wedding website with an RSVP form. On the form I have a drop down menu with "I am attending" and "I am not attending".

I'd like to be able to send different emails to these people based on their responses.

I can't find anything about including conditional login inside the auto-responder part of the plug-in.

Thanks for your help.

via Chebli Mohamed