It's really simple.
Native: Who are you?
Soldier: I'm John, from Philadelphia.
Native: John From?
Soldier: Yeah, John, from Philadelphia.
Native: John Frum.
Soldier: Yeah, you got it.
Native: Who are you?
Soldier: I'm John, from Philadelphia.
Native: John From?
Soldier: Yeah, John, from Philadelphia.
Native: John Frum.
Soldier: Yeah, you got it.