You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you at this moment?

USER: Can you please change my reservation as the baby shower program which I want to attend got postponed?

ASSISTANT: Sure, I am gleeful to assist you. Can I have your name please?

USER: Sure, my name is Gregory Phillips.

ASSISTANT: Thanks for your name, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for availing us.