You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you the best today?

USER:  I am Nicholas Wright want to cancel my reservation due to prepone of my exams.

ASSISTANT: Ok, I can help you. Please wait a minute.

USER: Ok.

ASSISTANT: I regret that there is no reservation found on your name.

USER: Thank you for your response.

ASSISTANT: Ok, Thank you for approaching us.