You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Owing to an emergency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

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

USER: Previously I have reserved my ticket with the name Jonathan Nelson.

ASSISTANT: Sorry Jonathan Nelson, there are no flights reserved on your given name formerly.

USER: Oh! That seems something went wrong while booking the ticket previously. Anyways, thank you for providing information.

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