You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Good evening. May I know your name please?

USER: I am Sharon Smith.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation.

ASSISTANT: Sure Smith, give me a minute.

USER: OK.

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

USER: Thank you.

ASSISTANT: Thank you.