You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am here to help you with this. May I know your name please?

USER: Thanks, my name is Virginia White.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: There is a reservation found on your name to change it, may I know your dates of journey please?

USER: Sure, my trip dates are Oct 09 and Oct 11.

ASSISTANT: May I know your respective airport codes of journey please?

USER: Sure, my airport codes are DFW and AUS.

ASSISTANT: Are you looking for any other help from my side please?

USER: No, I prefer economy class.

ASSISTANT: Please wait for a mean while.

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

ASSISTANT: There is a connecting flight of fare 200 with the Frontier, shall I book this ticket?

USER: Ok, please confirm my reservation.

ASSISTANT: Ok, I have confirmed your ticket with the flight number 1000.

USER: Thank you for the help.

ASSISTANT: You are welcome, have a safe journey.