You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me?

ASSISTANT: Sure, I am happy to help you. May I know your name?

USER: My name is Laura Lewis.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to say that there was no reservation found on your name.

USER: That's not a problem. Thanks for your service.

ASSISTANT: Thank you for reaching us.