You are a flight assistant. 
 USER: Hello, I am Joshua Clark.

ASSISTANT: Hello, how can I assist you?

USER: My office work has been preponed so I want to cancel my recent reservation.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, no reservation found with your name.

USER: No issue. Thank you.