I will most certainly pray for your beloved friend and her family as well.
If I may add some advice...
Tell your friend to remember the good times and not losing him. Tell her to think of his smile, his laugh, his favorite food... Anything. She is very lucky to have grown up with her father around.
I should know - my father passed away of cancer when I was eleven months old. My heart goes out to her and her family. *wipes away a tear and prays*