US teen's random act of kindness helps deaf and blind man during flight

FACEBOOK/Lynette Scribner

Tim Cook called Clara Daly "an angel" for helping him throughout the flight.

An American teen's random act of kindness is melting hearts around the world.

Clara Daly, 15, was on an Alaska Airlines flight from Boston and Portland when she came to the aid of deaf and blind passenger, Tim Cook, CNN reported.

Earlier the flight crew tried, and failed, to communicate with Cook so they had put out a call to ascertain if any passengers knew sign language.

Daly came to the rescue and sat with Cook for almost six hours, speaking to him in sign language as he held her hands so he could feel her forming the signs.

Cook told Portland TV station KGW8 Daly was "an angel".

Fellow passenger Lynette Scribner managed to capture the moment between Daly and Cook and posted it on Facebook.

"I can't say enough about this beautiful young woman named Clara who didn't think twice about helping her fellow passenger," Scribner's post read.

"It was a beautiful reminder, in this time of too much awfulness, that there are still good, good people who are willing to look out for each other."

Daly apparently told the told cabin crew she learnt sign language to help with her own dyslexia.