You prolly wanna call them --
5.5. Substitutes
No name change or designation of a substitute is allowed for Special Rate bookings.
In the case of Flex Rate or Base Rate bookings, the designation of a substitute within the tariff booked is allowed for the entire carriage service up to 24 hours prior to the departure of the outbound flight. A subsequent amendment of bank or credit card data is not possible in connection with a name change. The contractual partner and the substitute are jointly and severally liable for the carriage costs.
The following flat-rate charges are assessed for name changes:
5.5.1. Flex Rate (Base Rate with Flex-Relax or tariff code “N”)
No name change fee for max. 3 rebookings up to 24 hours prior to the departure of the first flight booked.
Starting with the 4th rebooking, the flat-rate name change charges assessed in conjunction with Base Rate bookings apply.
Starting 24 hours prior to the departure of the first flight booked or after the date of departure, no name change is possible.
5.5.2. Base Rate (tariff code “SPO”)
EUR 30.00 per person and route up to 24 hours prior to the departure of the first flight booked for short- and medium-haul flights (max. 5 hours’ flight time); children under 2 years free of charge.
EUR 60.00 per person and route up to 24 hours prior to the departure of the first flight booked for long-haul flights (min. 5 hours’ flight time); children under 2 years free of charge.
Starting 24 hours prior to the departure of the first flight booked or after the date of departure, no rebooking is possible.
5.5.3. Special Rate (tariff code “LM”)
No rebooking is possible.