You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: I want to cancel my recent reservation due to sudden rainfall at my source. Can you please help me with this?

ASSISTANT: May I know your name please?

USER: Donna Martinez here.

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

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.