Create a survey for confirmed users

There is a way to build surveys available to confirmed users in a conference ? E.g. I would like to know in a multiple day event, when each user will be really present or not at some specific time.
It’s just like a google form, but closed to registered users and built with indico tools…
There’s a plugin to do so that I don’t know ?

No. Any reason you don’t want to do that in the registration form? You can add new sections/fields later and ask them to update their registration.

Thanks for the clarification. Some reasons block me from updating the registration form, The first one, is the fear of deleting some data that users given in the past, the need for additional data from registered only people and the registration form is not closed yet, the linearity of the process, so asking a user to change anything in a form that was “finished” can panic someone.
Probably I’m wrong…