Hello,
I have a booking in Biz from MEX via FRA and I have contacted M&M to UPG to First against evouchers, but they told me that it was not possible.
I understood that you could always asked to be wait listed but I understand that I was wrong.
The flight is in 3 months time but there are, at least, 6 available seats available.
A few weeks before the flight, providing there are still seats available, it makes sense to call again or LH does not want to do upgrades to F against vouchers?
Thanks,