Los Angeles, 15-year-old Clara Daly from California, was travelling with her mom.
A flight attendant asked if anyone knew sign language. Clara, who had studied ASL for about a year, volunteered.
The passenger was 64-year-old Tim Cook, who is deaf and blind, flying alone. Clara knelt in the aisle and fingerspelled into his hand to communicate. She helped him order water, check the time, and speak with the crew.
For the rest of the long flight, she stayed with him, chatting until landing and bringing comfort to his journey.