You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Kenneth White.

ASSISTANT: How may I assist you at this moment white?

USER: My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you with that. Please wait a moment to check your previous reservation.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that, there is no reservation on your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us, hope you have a great day.

USER: You are welcome.