You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Wright.

ASSISTANT: How may I guide you today?

USER: I want to cancel my recent reservation because my brother marriage was postponed, can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check the flights on your route. Please wait a moment to check your previous reservation.

USER: Ok, take your own time.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

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

ASSISTANT: Thank you for approaching us, have a great day.