You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, may I know your name please?

USER: My name is Benjamin Williams.

ASSISTANT: Sorry Williams, there are no flights reserved on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome.