Once you log in to e2m Onair and visit the Expo Booth, enter any booth and find an icon called Start Conversation. Once you click on it, you will see a different option to start your conversation with the booth representative.
Option for Conversation: Video Call, Email, Chat
You also have an option to Exchange Business Card. To know more about it, please read this article.
Reach out to the support team for any issue or info firstname.lastname@example.org.