Task: Story Composition
Input (English): Premise: Matt decided he wanted to visit his mother this weekend. 
 Initial Context: He packed his bag and took a bus after work. 
 Original Ending: Matt and his mother had a great weekend together. He took the bus back home on Sunday. Matt was happy he had visited his mother. 
 New ending: Matt and his sister had a great weekend together. He took the bus back home on Sunday Matt was happy he had visited his mother and sister. 
Output (English): He called his sister and asked if she wanted to come.