Oh my gosh i am so sorry (9/11)

My dad died in 9/11 when I was 6 years old. 4 days later I turned 7, when people find out that my dad died they say oh my gosh I am so sorry... I have looked for answer's all this time now but I still don't know what to say after they say omg, I mean I...

cant say its ok cause well ITS NOT and it feels weird to say thank you because it doesn't make sense, what do I say???

thank you for you concern. that works for me...

say I appreciate your concern

just kinda smile and look down like dont really give in answer or just like say yea.. and look away
thats what I do

I would not look away , makes people uncomfotable. I would say what beautiful said. It is really sad and that whole day changed the lives of many people. I am sure that when these people say this to you, they really mean it. It was something that should have never happened. I hope you can or did find peace in your heart with what happened to you.

Say, So am I... and just put a pause there. They will get an honest concern then.