Without knowing who Joanna is, there is no way to know where she was going. If she is a character in a movie or book, further details are needed to answer the question.
Joanna Pacitti goes by JoJo.
Joanna Syrokomla goes by Josy.
Joanna Strapp goes by Jo.
Joanna Koroniewska goes by Zuzia.
JoAnna Lloyd goes by Rosie.
Joanna Janetakis goes by Joey.
Joanna Manning goes by JoJo.
Joanna LaRose goes by Jo.
Joanna Hernandez goes by Cocktail.
Joanna Borja goes by JJ.
JoAnna Cameron goes by Casey.
Joanna Shewfelt goes by Jo Jo.