Passover Tradition and Elijah

As Sarah's family prepares for Passover, Sarah makes sure to save a chair at the table for the prophet Elijah who is said to visit every seder. But when the electricity goes out in the buildings across the street and the neighbors start arriving at Sarah's apartment, her parents invite each visitor to join the seder.

Sarah adds another place setting for Elijah, and then another, but soon the table is full with people from her neighborhood and there are no more chairs to spare! How can Sarah honor the Passover tradition of saving a place for Elijah?