You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Actually my Musical program is cancelled so that I want to cancel my recent reservation, can you help?

ASSISTANT: May I know your name?

USER: Sure, I am Timothy Lopez.

ASSISTANT: Sorry Timothy, no reservation found.

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

ASSISTANT: Thank you for choosing us.