You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my recent reservation due to health issues, can you help me in doing that?

ASSISTANT: May I know your name please?

USER: I am Brenda Hill.

ASSISTANT: I am sorry no reservation found on your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.