VS Gold Upgrade Voucher

Hi,
So I'm lucky, I renewed gold this year with excess of 80 tier points and got a gold upgrade voucher as a reward, however I'm getting conflicting information depending who I talk to... I understand the voucher is for 2 passengers for a round trip class upgrade eg: Y to PE or PE to UC
Now I tend to travel alone, does anyone know if the Gold reward can be used for a single passenger or does it HAVE to be used for 2 passengers (which basically means I'll never get to use it and the reward is useless to me :( )?
Thanks
So I'm lucky, I renewed gold this year with excess of 80 tier points and got a gold upgrade voucher as a reward, however I'm getting conflicting information depending who I talk to... I understand the voucher is for 2 passengers for a round trip class upgrade eg: Y to PE or PE to UC
Now I tend to travel alone, does anyone know if the Gold reward can be used for a single passenger or does it HAVE to be used for 2 passengers (which basically means I'll never get to use it and the reward is useless to me :( )?
Thanks