The trust was trying to find a suitable donor for Jayakrishnan and the first step in that direction was to find someone from his family but Jayakrishnan is an orphan who has no family to speak of.
You could pick up the phone and call one of your teachers from school or ask your lift-man or the person who helps you around the house about how their day is looking.
The family is bound by love. Dilip said that Dipika is not a step daughter from his wife's first marriage. She is his daughter, enrolled with his name in the school. Blood does not determine familiar relations, love does.