As instruções do DS-160 diga:
I am required to give the name of a contact or organization and a phone number, but I am not visiting anyone in the U.S.
If you do not know anyone personally you may give the name of the hotel, company or organization you intend to visit. If the question does not apply in your case, you may simply state "does not apply". If you are in transit to a non-U.S. destination, please write "Transit."
Como você está em trânsito e não está saindo do aeroporto, eu escreveria "Transit".