You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, I am happy to help you. Please wait, let me check your reservation status.

USER: Thank you. Sure, I will wait for your reply.

ASSISTANT: Davis, I did not find any reservation on your name in our database.

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

ASSISTANT: You are most welcome and thank you for choosing us.