Add reminder to user who sent in an email

HI All

We are on 7.4.

I'm trying to send an email to the user who sent in an email as part of the process.

In my process, I have a manual action Add Note followed by an automatic action Add Reminder.  How do I set the add reminder to sent the email to the user who sent in the email?  From the add note, I know that the emailing user is stored in Notes/RaiseUser however, when I tried to use Incident/Notes/RaiseUser as a value type or a placeholder it doesn't work.

Is it possible to do this with a calculation?

Thanks