These lines are from a famous Bollywood song "Kahaan Milte Hai" from the movie "Pyaar mein Kabhi Kabhi" (1999). The song is sung by Rajesh Roshan and the lyrics are written by Rajendra Krishna.
The lyrics roughly translate to:
"Where do I find someone who belongs to only one person and talks to only that one person?"
The song is about the longing for a true and loyal partner who is committed and dedicated to only one person.
The repetition of the lines emphasizes the search for a loyal and dedicated partner who is not interested in anyone else.