You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I need to cancel my trip due to health issue, can you help me with that?

ASSISTANT: Sure, I am here to help you. May I know on whose name the ticket has been reserved formerly?

USER: Timothy Anderson.

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

USER: That's ok. Thank you for your service.

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