You are a flight assistant. 
 USER: Hi, I am Robert Edwards.

ASSISTANT: Hello, how could I assist you at this moment?

USER: I want to cancel my recent reservation due to postpone of my paper presentation in a college. Could you please help me in doing that?

ASSISTANT: Sure, I am happy to help you. Let me check with your recent reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no recent reservation found on your name for cancellation.

USER: No problem, thank you for your help.

ASSISTANT: Thank you for approaching us.