You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation, can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: I'm Frank Williams.

ASSISTANT: Sorry Frank, unfortunately there is no reservation found under your name.

USER: OK, no issues and thank you for the information.

ASSISTANT: Thank you, have a good day.