You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Prepone plan came into a picture owing to announcement of birth of baby boy. So can you please help me to change an existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: My good name is Brain Smith.

ASSISTANT: Please wait for a minute, I will revert to you with current status.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation found with your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching us.