Hello Jennaw,
Good thing you asked this question.
If you do not show up for the first flight on your booking, or fail to show up for another flight on a multi-segment booking, all remaining flights are cancelled, and the fare, fees, charges, surcharges and taxes will not be refunded or made available for reservations.
It is a requirement of using the getaway voucher that the member and the companion book and travel on the exact same itinerary.
Sorry!
Darren