You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from my side?

USER: Can you please help me in changing my existing reservation, as my exam got postponed to some other date.

ASSISTANT: Sure, I am glad to help you and may I know your name for checking your previous booking?

USER: My name is Justin Thompson.

ASSISTANT: Thank you for your information, I have found your reservation. May I know your new airport codes?

USER: Sure, my airport codes are PHX to AUS.

ASSISTANT: May I know your preferable travel dates?

USER: My travelling dates are April 04-06.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Give me a moment.

USER: And I want to depart in the afternoon. Ok.

ASSISTANT: Thank you for your information, there is a flight 1017 with a 1 drop off in Hawaiian airlines and the fare of the ticket is 100. Is it ok for you to book the ticket?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket booking is confirmed on your travelling dates.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us and have a happy journey.