You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my recent reservation due to some health issue. Can you help me?

ASSISTANT: I am sorry to hear that. I will help you. Please let me know with your name.

USER: Thank you for considering my request. I am William Thompson.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: William Thompson, I regret to inform you that there is no booking done on your name.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great time.