You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my recent reservation, can you please help me?

ASSISTANT: Ok, I will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Paul Lee.

ASSISTANT: There is no reservation on your name in our database.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for opting us.