You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, we are here to help you. Please wait a moment.

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

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found on your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for availing us.