You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: There is a slight change in my existing reservation, can you please help me?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Myself Nancy Wilson.

ASSISTANT: Ok, please be on hold for some time.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for approaching us.