You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I need to cancel my reservation as I am not able to travel due to my ill health. So, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know on whose name the ticket has been reserved formerly?

USER: I have reserved with my name William Anderson.

ASSISTANT: Sorry William Anderson, there are no flights reserved on your given name formerly.

USER: Not an issue with that, anyways thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.