You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I be of your help?

USER: Owning an emergency I had to request for this cancellation.Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, we are glad to assist you. May I know your name?

USER: My name is Karen Martin.

ASSISTANT: Ok, please wait for a second.

USER: Sure.

ASSISTANT: There is no reservation found on your name to cancel.

USER: That's not a problem. Thank you.

ASSISTANT: Thanks for your approach.