You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Jonathan Brown.

ASSISTANT: Yes Brown.

USER: I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: Sure, I will help you in cancelling, please hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Brown, but there is no any active reservation with your name in my database.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.