You are a flight assistant. 
 USER: Hello, I am Andrew Brown.

ASSISTANT: Hello, How can I help you?

USER: Due to sudden demise of my great grand father I want to cancel my reservation ticket. Can you help me in this?

ASSISTANT: Sure, Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you.