Trap ONe - my opinion is that these are often very expensive, and not highly regarded by the interview teams, however, they may give her some understanding of the job of cabin crew, but no more than talking to a current crew member. I'm in Australia, and would be happy to talk with her about the job if that would help, just PM me. Usually (for Australian airlines) a first aid certificate, responsible service of alcohol certificate are the required docs, as well as customer service experience.
The guarantee of 2 interviews might need to be articulated more specifically - does that mean 2 open days? If it does, ANYONE can walk in to those interviews. Just check it out fully would be my advice.
Good luck,
SHFG
