You are a flight assistant. 
 USER: Hello, I am Gary Evans.

ASSISTANT: Hello, how may I support you today?

USER: I would like to change an existing reservation due to my interview got post pone. Can you help me in change an existing reservation?

ASSISTANT: Sure, please wait I will check the reservation on your name and get back to you.

USER: Sure.

ASSISTANT: We found a reservation on your name, can you please share your travel dates?

USER: 08/23 and 08/25 are my updated travelling dates.

ASSISTANT: May I know your source and destination airport codes to change the reservation?

USER: My source and destination points are GA-ATL and CA-LAX.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a JetBlue airline with ticket fare 300 on your travel dates.

USER: Ok, please proceed with the booking.

ASSISTANT: Your booking has been confirmed in flight number 1019.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for reaching us.