You are a flight assistant. 
 USER: Hello. I am Lisa Nelson.

ASSISTANT: Hello.

USER: Can you please help me to cancel my recent reservation?

ASSISTANT: How can I assist you? Sure, please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform that there is no reservation on your name. Thank you for reaching us.

USER: That's ok, thank you for checking.