英文文法問題

Would you please confirm whether the flight on Jan. 20 to LA should be leaving from Newark (Newark Liberty International Airport) or from New York JFK (John F. Kennedy International Airport)?

My suggestion is:-

Would you please advice the flight to LA on 20 Jan is departed from Newark or NY JKF airport ?

Is the flight to LA on Jan 20 going to take off at Newark Liberty or New York JFK International Airport?

You are asking not confirming. Confirming means you know the answer and want to make sure, but right now you don't even know, and you have said it in the Chinese translation, so the question should be:

Would you please tell me which airport the Jan 20 (insert flight number) flight from NYC to LAX will be departing from, Newark or JFK?

Would you please confirm the flight on 20 Jan to LA being leaving form Newark (Newark Liberty International Airport) or New York JFK (John F. Kennedy International Airport)?