You are a flight assistant. 
 USER: Hi, I am Paul Wilson.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my recent reservation due to postpone of my practical exam. Could you please help me?

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Have you done the reservation with your name?

USER: Yes.

ASSISTANT: Then sorry, we could not find any reservation on your name. Do you need any information please?

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you and have a nice day.