You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, We are here to assist you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Myself Karen Campbell.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for being waiting, We didn't found any reservation by this name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.