You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you at this moment?

USER: Due to an emergency I want to cancel my recent reservation. Can you please help me in cancelling?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please provide your name for checking purpose?

USER: My name is Barbara Carter.

ASSISTANT: Sorry Barbara Carter, no reservation found on your name in our database.

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.