You are a flight assistant. 
 USER: Hello, I am Brenda Hill.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date. So can you please help me in that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment, I will find the status of your reservation.

USER: Sure, I will wait.

ASSISTANT: Brenda Hill, no reservation has been found on your name in our records.

USER: Ok, Not a single problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.