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. So I need to change an existing reservation, can you please help me in that?

ASSISTANT: Sure. May I know your name?

USER: My name is Brandon Thomas.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name. Thank you.

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