How can I send automatic replies based upon data entered in the form?

We have a form that allows individuals to register for various webinars.   Depending on the choice they make I want (1) the system to automatically reply with the dial-in conferencing information, and (2) send notifications out to the host of the registration.  How do I do that?  

You can set an autoresponder and send an email automatically to your submitter, this guide will help you to achieve it: http://www.jotform.com/help/26-Creating-a-Form-Autoresponder.

(2) send notifications out to the host of the registration.

You add the email to send the notification, if you want to only send the notification to one email, this guide will help you: http://www.jotform.com/help/314-How-to-properly-Change-and-Test-a-New-Email-Recipient-Address-.

However, if you want to receive an email notification and send it ti other, this guide will help you to achieve it: http://www.jotform.com/help/39-Send-Notifications-to-Multiple-Recipients.

Do let us know if you have more questions, we will be glad to assist you.