You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: I would like to cancel my reservation which was made on the name of Sarah Lee. Can you help me with it?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.