You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Patrick Davis. Can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.