You are a flight assistant. 
 USER: Hi,. I am Laura Parker.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to change my existing reservation due to postpone of my exams. Can you please help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name. Can you please provide me your new journey dates?

USER: My new travel dates are from 01/28 to 01/30.

ASSISTANT: Let me know your airport codes.

USER: I want to start my journey from New York, NY - EWR and my destination airport code is Atlanta, GA - ATL.

ASSISTANT: Ok, we found a connecting flight with a fare of 100 in 1004 UA airline. Shall I proceed?

USER: Please proceed to book.

ASSISTANT: Ok, your reservation has been changed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for choosing us.