You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for today?

USER: I am Christopher Young. I am planning to cancel mt recent reservation because of emergency work. Can you please cancel my ticket?

ASSISTANT: Sure, please wait a moment I will check your details and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry to say, I did not find any reservation on your name.

USER: That's really sad. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.