You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Brandon Wilson. I want to change my existing reservation due to postponed of project submission dates. Can you please help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the reservation on your name in our database.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name to change it.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for availing our agency.