You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I assist you?

USER: Due to some health issue, I want to cancel my recent reservation. Can you please cancel my reservation?

ASSISTANT: Please specify your name?

USER: Sure, I am Brian Perez.

ASSISTANT: Ok. No reservation found.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you.