You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: I am Timothy Evans.

ASSISTANT: Ok, Timothy Evans, how can I be your helping hand today?

USER: As I am a singer, my musical concert got postponed, due to which my all travelling plans got changed. So please help me in changing an existing reservation?

ASSISTANT: Sure, we are gleeful to help you. Please wait for a couple of minutes, I will check the status and notify you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no reservation has found based on your good name.

USER: Not an issue. Thanks for your good response.

ASSISTANT: Thank you for opting us. We hope to serve you again.