You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Sure, my name is Deborah Allen.

ASSISTANT: Give me a minute. Thanks for waiting, we found a reservation on your name. Can you please share your updated journey dates?

USER: Sure, my new departure and return travel dates are 16th and 18th of June.

ASSISTANT: Let me know your source and destination airport codes?

USER: My source and destination airport codes are SEA and AUS.

ASSISTANT: Do you have any other specifications?

USER: Yes, my departure time should be morning.

ASSISTANT: Thank you for sharing the details. I am sorry to inform you that, there were no flights available that matches your requirements.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for approaching us.