You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to change my recent reservation because my brother marriage was got postponed, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Edward Parker.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Parker, there is no reservation found as per your name to change it.

USER: Oh! not a problem, thank you.

ASSISTANT: You are welcome.