You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name please?

USER: I am Elizabeth Clark.

ASSISTANT: How can I help you today?

USER: I need to cancel my recent reservation because my examination has been postponed.

ASSISTANT: Sure, please hold for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, but there is no reservation found on your name.

USER: No issue. Thanks for your quick response.

ASSISTANT: Thank you for choosing us.