You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me to change my active reservation as my meeting was postponed?

ASSISTANT: Sure, I am glad to help you with that. Can I know your name to check your previous reservation?

USER: Myself Patrick Allen.

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

USER: Ok, no problem. Thank you so much for your information.

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