You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my recent reservation due to my brother marriage was postponed, can you help me?

ASSISTANT: Can I know your name?

USER: I am Amanda Lewis.

ASSISTANT: Let me check details with your recent reservation.

USER: Ok, take your own time.

ASSISTANT: I regret, there in no reservation by your name.

USER: That's ok, thank you for giving information.

ASSISTANT: Thank you.