You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Campbell.

ASSISTANT: OK, Jerry tell me how may I you.

USER: Actually my exam is cancelled, can you help me to cancel my reservation?

ASSISTANT: OK, sure. Wait a second. Sorry to say there is no reservation found on your name to cancel.

USER: Oh! that's fine. Thank you for your help.

ASSISTANT: OK, thank you for contacting us.