How to Configure An Email to Add Additional Info to the Contact Record

Hi. I have a ZOHO sign-up form on my web site so leads can ask for additional information. The basic form requests First Name, Last Name and Email. I want to send a follow up email through an autoresponder that asks for additional information. (I run a children's summer camp so I want to know who's requesting the information (parent, camper, other) the age of camper, and the activities in which they are interested.)

How do I create an email that will add this additional information to the Contact record so that I can segment my list of contacts?

Thank you