You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have to cancel my flight ticket reservation done in the past month to write an exam in Seattle university but the got cancelled and changed to some other dates, so I need your help in my flight ticket cancellation. Can you please help me in that one?

ASSISTANT: May I know your name to check for the previous reservation?

USER: Sure, my name is Rebecca Moore.

ASSISTANT: Please allow me a moment to check for the previous reservation.

USER: Sure, I can wait for your response.

ASSISTANT: Rebecca, there is no reservation found under your name.

USER: Ok, that's fine. I think it might be cancelled by y brother. Thank you for your information.

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

USER: Welcome.