You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My plan to visit a party got postponed, would you please help me to change my existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: My good name is Brenda Lewis.

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

USER: Ok, thank you.