-Ms. Earhart is quite mature for her age; she certainly won't ever be interested on her own.
-If she doesn't want to go, make it so that she doesn't have a choice.
-Maybe she just needs a push in the right direction.
-Maybe the Molepeople can help?
-Get the Moleman to cast his curse on you, thus forcing Amelia to fly right into Slushie's waiting arms.