You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: Due to bad weather in New York I have cancelled my holiday trip. So can you go ahead and cancel my flight ticket?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Robert Lopez.

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

USER: Not a problem. Thank you.

ASSISTANT: You are welcome, have a nice day.