You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, I need to change my earlier reservation with name Angela Williams. Can you please change my reservation?

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: No reservation was found on your name.

USER: It's ok. Thank you for the information.

ASSISTANT: May I know your name please?

USER: I mentioned already.

ASSISTANT: Ok, Thank you for opting us.