You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Mark Phillips. I am planning to cancel my recent reservation, due to health issue. Can you please help me out?

ASSISTANT: Yes, give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for contacting us.