In your .XLSX, add columns for the different sessions. Correspond guests to sessions by adding a "yes" in the cell if a guest is attending that session. You do not have to fill out cells if a guest is not attending a session.
Upload your .XLSX into Boomset. You will be asked to match the information from the fields in your list to the fields in Boomset. To match your sessions, click the settings gear, and select the “Add as New Session” option. Save your selection.
Now, if you look in the "Sessions" area of your event, you will be able to see the sessions that you created in your .XLSX. If you look in the app on your iPad, you should now be able to see your attendees in their selected sessions.
Important Note: This method will allow you to change session selection at an event through the iPad without having to make any other changes.