You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Good morning. What can I do for you?

USER: My holiday vacation has been postponed.Can you please help me for changing an existing reservation?

ASSISTANT: Sure, may I know your name for finding your reservation?

USER: The reservation should be on the name of Brian Edwards.

ASSISTANT: No reservation found on your name Mr.Brian Edwards.

USER: Ok, no problem.

ASSISTANT: Do you want any other help?

USER: No, thank you for your information.

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