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

ASSISTANT: Hello, how may I help you today?

USER: Due to emergency I need to cancel my recent reservation, Can you help me for cancel reservation please?

ASSISTANT: Sure, I will help you. Please, wait for a while, let me check the reservation list.

USER: Sure.

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

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you, have a nice day.