You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Owing to an emergency I had to request for this change reservation, can you please help me in that?

ASSISTANT: Sure, please provide your good name?

USER: My name is Raymond Green.

ASSISTANT: Please hold a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found on the given name.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.