Task: Story Composition
Input (English): Premise: Alex was starting to outgrow his car seat. 
 Initial Context: His mom took him to the store and bought him a booster seat. 
 Original Ending: He was really excited to get to sit in it. His mom installed it right away. Alex got to ride home in his new seat. 
 New ending: He was really excited and chose a red one. His mom installed it right away. Alex got to ride home in his new seat. 
Output (English): She let him pick out his favorite color.