You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to cancel my recent reservation as my trip got postponed?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: I am Robert Nelson.

ASSISTANT: Please mention your name.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Welcome, have a nice day.