You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my recent reservation due to sudden demise of my granny. Can you help me with that?

ASSISTANT: Sure, may I know your good name?

USER: I am Helen Moore.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.