You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Actually  my Examination is postponed, so that I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Thank you. Sure, I am Jonathan Moore.

ASSISTANT: Moore, no reservation has been found on your name.

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

ASSISTANT: Thank you for choosing us.