What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Yes, you can do that using the email alerts. Here's a guide that you can follow: https://www.jotform.com/help/30-Explanation-of-Email-Notification-and-Autoresponder-Settings
There are two types of email alerts, one is the notification email and the other is the autoresponder email. The notification email is usually used for specific addresses you want to send an email, the autoresponder email on the other hand is used to send an email to the email address entered in the form. In your case, if you wish to send an email to the registrant, then you should used the autoresponder email.
It would be best to try it out so that you can see if it fits your needs.
I hope that helps.