You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to sudden demise of my Great grandfather, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Can I know your name?

USER: Sure, I am Sandra Moore.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you.