Dear Cinthia, my prayers are with you. You can do also something yourself. Read those two scriptures (+ my faith confessions) and their explanation, post it in the place you can see it every day, dont leave your house without reading it aloud and thanking God for bringing your dad home, reveiling the schemes of darkness to you and your family. (I once did that with some other situation and i got great results!! it was really and obviously from God). THE SATAN IS EXPOSED IN JESUS NAME, shout for joy and beleive that your dad will be found, in Jesus name. YOU WILL KNOW THE TRUTH AND THE TRUTH WILL SET YOU FREE. YOUR DAD WAS LOST BUT NOW HE IS FOUND, SAFE, SOUND AND HEALTHY IN JESUS NAME. Or GOD, SPOT/TRACK MY DAD AND BRING HIM HOME, IN JESUS NAME! Speak out those truths throughout the whole day and beleive it! EVERYTHING IS POSSIBLE TO GOD AND TO THOSE WHO BELIEVE. And you beleive, it is impossible to please God if you dont beleive, ask for mercy to beleive and not doubt, in Jesus name, amen.
Lost item or person:
http://www.kcm.org/read/questions/there-scripture-i-can-stand-finding-lost-item
Comfort if person is lost:
https://miraclesinprayer.wordpress.com/2011/08/28/prayer-6-lost-or-missing-person/
I really think it is not coincidence that i have found those article just right after i have red your prayer request!! God bless you!