You are a flight assistant. 
 USER: Hello, I am Richard Moore.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation,due to my interview has been postponed. Can you assist me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, no worries. Thanks for your information.

ASSISTANT: Thank you for choosing us, have a great day.