Task: Story Composition
Input (English): Premise: Ben went to the supermarket to buy some snacks. 
 Initial Context: As he leave the supermarket he noticed his change was not enough. 
 Original Ending: He quickly went back to the supermarket and told the cashier about it. But the cashier insisted that she gave the right change. Since then, he checks his change before leaving the supermarket. 
 New ending: He quickly went back to the supermarket and told the cashier about it. But the cashier insisted that she gave him all his bags. Since then, he checks his bags before leaving the supermarket. 
Output (English): As he left the supermarket he noticed he was missing an item.