Tried searching the forum and various online resources and can’t find the answer to this.

Ive got a one way redemption from LAS to MAN and reward seats have opened up for MAN to LAS, if I book the seat as a separate booking, can I call VS at a later date and merge the 2 bookings to save on the taxes? I’m sure it’s possible but can’t find where I previously read it.

Don’t want to wait and lose the seat but don’t want to call VS right now - they’ve got enough on their plates!