You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, may I know your good name for further checking?

USER: I am Rachel Wilson.

ASSISTANT: Please wait for moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation as per your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us with a query.