I don't have the music file and have no information about it, but I've heard it many times. It sounds like Western classical music: something like flute accompanied by string orchestra, I guess. I just tried to whistle a part of it on this audio file. Hope it's close enough and helps!
Is it possibly Kriesler's "Sicilienne"? It's not a close match, but there are some distinct similarities in the rhythm and the overall melodic line.