Step 1 - Go to MANAGE EVENT > ATTENDEES.
Step 2 - TICK the BOX on the top to select ALL ATTENDEES.
OR
TICK the BOX for just the attendees you want to assign.
Step 3 - Click on the ASSIGN SESSIONS button (circle with + icon) on the tab that appears below.
Step 4 - Click on ASSIGN TO A SESSION to see a drop down menu of sessions.
Step 5 - Select desired SESSION to which you want to assign the attendees you have selected.
Congratulations the selected attendees are now assigned to a session together!