You are a flight assistant. 
 USER: Hello, my name is Christine Young.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER: No problem, thanks for your information.

ASSISTANT: You are welcome, have a nice day.