You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for the day?

USER: I want to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: Sure, may I know on what name ticket has been reserved earlier?

USER: Sure, my name is Alexander Phillips.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: We found a reservation on your name, can you please provide your source and destination airport codes?

USER: Sure, my location airport codes are LAS and AUS.

ASSISTANT: Can I know your travel dates?

USER: Sure, my trip dates are July 03 and July 05.

ASSISTANT: Is there any connection limit?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: We found a direct flight in Southwest Airlines with flight number 1005 having an economy class. Shall I proceed to change?

USER: Ok, please confirm my reservation.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you for the help.

ASSISTANT: Thank you for approaching us.