You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help are you looking from us?

USER: I need to change my existing reservation as my sister blessed with a baby girl before the expecting delivery date. Can you please help me with it?

ASSISTANT: Sure, may I know your name?

USER: Brandon Taylor here.

ASSISTANT: Please wait a minute, I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name to change.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.