You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you help me?

ASSISTANT: I am happy to help you, please wait. Let me check your reservation status in our database.

USER: Ok.

ASSISTANT: May I know your name?

USER: Barbara Rodriguez here.

ASSISTANT: I found your reservation, may I know your travel dates?

USER: Dates are 02/03 and 02/05.

ASSISTANT: Ok, please let me know your source and destination airport codes?

USER: My airport codes are AUS-MCO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find any flight available on your preferred travel dates.

USER: No problem, Thanks for the information.

ASSISTANT: You are welcome and thank you for choosing us.