You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Lee.

ASSISTANT: Hello Kevin, Good Morning.

USER: I am planning to cancel my resent reservation, due to some heath issue.Can you please cancel my ticket?

ASSISTANT: Sure, I am happy to help you. Could you please wait for a moment?

USER: Ok, take your own time.

ASSISTANT: Sorry Kevin, there is no reservation available for you.

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

ASSISTANT: You are welcome.