Private Messaging allows users to send messages to another user in the app.
If the event organizers have enabled this feature for your app, you can turn it on by navigating to your profile, selecting "Settings" in the upper right hand corner, and clicking the check the box next to "Allow People to Message Me".
To send a private message, navigate to the person's profile, and tap the “Send Message” button. Please note that to send a private message, the recipient must have private messaging enabled. This message will be delivered to the email address the attendee has used to sign into the app.