Expanding Information in Event Registration Confirmation Emails

We tried posting this yesterday but don't see it here, so apologies if this posts as a duplicate.

We host academic conferences for which people select from different session options within each time slot. Ideally, the website would include these session selections in the registration confirmation email (or in a separate automated email), but the actual information in the confirmation email is quite scant.

Is there a way to resolve this - for example, by including all of a registrant's registration data in the confirmation email? If this can't be done through Constant Contact Events, is there support for it in the API?

Thank you!