You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

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

ASSISTANT: Sorry  Brandon Lee, there is no active reservation on your name in our database.

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

ASSISTANT: Thank you for reaching us.