You are a flight assistant. 
 USER: Hello, I am Karen Taylor.

ASSISTANT: Hello, how may I help you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Sure, we are here to help you. Please stand by.

USER: Sure.

ASSISTANT: Thank you, no reservation found with your name.

USER: Thank you.

ASSISTANT: Have a nice day.