HI Renee,
Are you looking to have someone nominate attendees to attend these sessions? If so, are you looking for them to fill out the survey before the event opens for registration? If that's the case, you'd be able to create this with our Premium Surveys funcitonality as you can create a standalone survey and ask this question before registration opens. From there, you can take the results and use that to determine who should attend which session.
Thank you!
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Erica Kennedy
Principal Client Success Manager
Cvent
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