You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I just want to cancel my recent reservation because I have some personal problems, so can you help me to cancel the ticket?

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: May I know your name please?

USER: My name is Robert Lee. It.

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

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

ASSISTANT: Thank you for opting us.