You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to cancel my brother's reservation because he met with an accident. Can you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your brother's name please?

USER: His name is Dennis Adams.

ASSISTANT: There is no reservation on your brother's name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.