You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation due to postponed of my meeting to other dates, so please help me.

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Frank Edwards.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: We could not find any reservation on your name.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us.