You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: Paul Lee here. Can you please help me to cancel my reservation which I have done last week.

ASSISTANT: Sure, I will help you.

USER: Ok, sure.

ASSISTANT: Sorry Paul, no reservation found with your name to cancel your reservation.

USER: It's ok, anyway thank you for the help.

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