You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My holiday vacation has been postponed, can you please help me for changing the existing reservation?

ASSISTANT: Sure, please wait for a moment to check your details. May I know your name?

USER: Sure, take your time. My name is Brandon Taylor.

ASSISTANT: I have found your reservation, can you help me with your new airport codes?

USER: The corresponding airport codes are from WA-SEA to NY-JFK/.

ASSISTANT: May I know your travelling dates?

USER: The travelling dates are 05/24 to 05/26.

ASSISTANT: There is a connecting flight-1010 of Delta airlines, shall I proceed with price 200?

USER: Yes, proceed with my booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: Welcome.