You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to cancel my reservation due to sudden health issue, would you please cancel my reservation?

ASSISTANT: May I know your name?

USER: My name is Jonathan Brown.

ASSISTANT: Sorry, no reservation found on your route.

USER: Ok, thank you for let me know about my reservation status.

ASSISTANT: Thank you.