You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how can I amend you?

USER: My business trip has been postponed, can you please help me for changing the existing reservation?

ASSISTANT: May I know your name?

USER: Sure, my name is Brenda Young.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in my listing.

USER: No problem, thank you for your information.

ASSISTANT: Most welcome.