You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Daniel Nelson. I would like to change my recent reservation because my brother marriage was postponed.

ASSISTANT: Yes, give me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, thank your for checking.

ASSISTANT: Thank you for consulting us.