Ally's considered trying to run away, but she realized it was highly unlikely she'll get far before Amy recaptures her. Secondly, even if she were able to reach the office she would not be able to reach the computer, let alone operate it. She needed Amy's help if there was any chance of getting things back to the way they were. At the moment, she would settle for just getting back to her normal size. The best course of action was to play with Amy and hope that Amy would help her in return.
After about five minutes the giant 12 year old girl found an outfit suitable for Ally. It was a dress that Ally recognized from Alice in Wonderland (which seems fitting). Amy opened the doll house door so Ally could put on the dress in private. The dress fit Ally almost perfectly. She felt relieved that she was no longer naked. She walked out the door and showed herself in front of Amy.
“How do I look?” Ally asked her giant friend.
"You look beautiful" Amy replied. A part of Ally was actually enjoying this experience.