You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christopher Young.

ASSISTANT: Young, how can I help you today?

USER: Owing an emergency, I want to cancel my recent reservation. Can you please help me?

ASSISTANT: Sure, I will help you. Please wait, let me check.

USER: Ok, take your own time.

ASSISTANT: Sorry Young, I have not found any reservation by your name.

USER: It's ok. Thank you.

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