You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recently done reservation, because of postpone of my exam. Can you please help me in this?

ASSISTANT: For further proceeding, may I know your good name please?

USER: Sure, I'm Stephanie Lee here.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to cancel.

USER: Thank you for contacting us.

ASSISTANT: Most welcome.