Putting tickets or credit on hold

Hi all
Sorry for my first post being a question.
I've been a regular flyer on the LHR<->JFK route for the last couple of years and have an S-class premium economy ticket upgraded with miles to upper booked for next week. Unfortunately plans have changed and I won't be needing to fly to JFK for the foreseeable future. I will be flying to the west coast at some point later in the year though.
Does anyone know if there's a way to put the ticket on-hold so I can change it to an SFO trip when I know the dates I need to fly?
Cheers
Pete
Sorry for my first post being a question.
I've been a regular flyer on the LHR<->JFK route for the last couple of years and have an S-class premium economy ticket upgraded with miles to upper booked for next week. Unfortunately plans have changed and I won't be needing to fly to JFK for the foreseeable future. I will be flying to the west coast at some point later in the year though.
Does anyone know if there's a way to put the ticket on-hold so I can change it to an SFO trip when I know the dates I need to fly?
Cheers
Pete