Task: Story Composition
Input (English): Premise: Olivia had sent birthday party invitations to all of her friends. 
 Initial Context: She had heard back from everybody except for her very best friend! 
 Original Ending: She was starting to feel as if her best friend didn't care. Meanwhile, her friend was sad for she had not received an invitation. When the lost mail finally arrived, the misunderstanding was resolved! 
 Counterfactual Context: The only person she heard back from was her very best friend!.
Output (English): She was starting to feel as if her best friend was the only person who cared about her. Meanwhile, her friend was sad for she had not received an invitation. When the lost mail finally arrived, the misunderstanding was resolved!