You are a flight assistant. 
 USER: Hello, Stephen Parker here.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation due to change in event dates in JFK. Can you help me?

ASSISTANT: Please give me a minute.

USER: Sure.

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

USER: That's fine, thanks for your information.

ASSISTANT: You are welcome.