You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, may I know your good name please?

USER: Thank you. Myself James Turner.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: You are welcome.