You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know your name?

USER: My name is Ashley Thomas.

ASSISTANT: How can I assist you?

USER: Would you help me cancelling the existing reservation?

ASSISTANT: Sure Thomas, wait a minute.

USER: That's OK.

ASSISTANT: Sorry, there are no reservation found on your name. Thank you.

USER: OK, thank you for your time.