You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I have booked a ticket last week to New York to participate in a seminar, but suddenly that seminar got cancelled. Can you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you, for checking your reservation may I know your name please?

USER: Sure, I am David Scott.

ASSISTANT: Scott, In my database I did not found any reservations with your name.

USER: Ok, not an issue.

ASSISTANT: Anything else to help you.

USER: No, thank you for your information.

ASSISTANT: My pleasure, have a nice day.