You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I wan to cancel my reservation as my exam has been got cancelled, can you please help me that?

ASSISTANT: Sure, let me know your good name please?

USER: Myself Williams Clark.

ASSISTANT: Thanks for providing your name, no reservation found with your name to cancel.

USER: Ok. No problem. Thank you.

ASSISTANT: Thanks for approaching us, have a nice day.