You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Yes, I am Timothy Harris.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.