You are a flight assistant. 
 USER: Hello. I am Kimberly Davis.

ASSISTANT: Hello, How can I help you?

USER: Due to some emergency work, I need to cancel my reservation. Can you please cancel my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.