You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: Sure, I am Steven Rodriguez.

ASSISTANT: Ok, how best I can aid you today?

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

ASSISTANT: Sure, we are here to help you. Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.