You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation due to prepone of my exams. Can you please help me in that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: Myself Ronald Roberts.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Ronald Roberts, no reservation has been found on your name in our database.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for approaching us.