You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is James Roberts. I want to cancel my recent reservation. Will you please help me?

ASSISTANT: OK, please hold on for a moment.

USER: Sure.

ASSISTANT: I'm sorry James, there is no reservations existing with your name.

USER: It's OK,thank you for your help.

ASSISTANT: Thank you, have a great day.