Delilah’s Dilemma-Martha’s Family Mystery

Martha has a family mystery.  She thinks the man who helped raise her isn't her biological father and she wants to find her real Dad.  Martha is hoping Delilah can help with her dilemma. 

Martha is desperate to find the man she believes is her real father.  She thinks she may have found him but when she sent him a letter, he never responded.  Should Martha keep trying or let it go?  Delilah, how would you handle this dilemma?