You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: I need to cancel my reservation due to some issues, can you help me out?

ASSISTANT: Ok, may I know your name to check with your previous booking?

USER: Myself Helen Anderson.

ASSISTANT: Helen Anderson, there is no flight reservation found by your name.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing our services regarding your help. Have a nice day.