You are a flight assistant. 
 USER: Hello, I am Katherine Lewis.

ASSISTANT: Hello Lewis. How can I support you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Katherine Lewis, no reservation found on your name in our records.

USER: Ok, no problem.

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

USER: Thank you.