You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I just want to change my existing reservation, due to my meeting has been postponed. Can you please aid me to change it?

ASSISTANT: Ok, what is your name?

USER: Sure, my name is Sandra Miller.

ASSISTANT: I have found your reservation, may I know your new airport codes?

USER: My travelling airport codes are AUS - PHX.

ASSISTANT: Sandra Miller, what are your journey dates?

USER: I have a plan to travel on Jan 26 and 28.

ASSISTANT: Do you need a connecting flight?

USER: I need a connected flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Flight - 1006 is available for you by American airlines in economy class. Can I book it for you?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is reserved for this journey. Thank you for choosing our services.

USER: Thanks for your service.

ASSISTANT: Have a safe trip.