You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my friend's reservation because he is unwell, can you please help me out?

ASSISTANT: Sure, please tell me your friend's name.

USER: His name is Anthony Mitchell.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: I found your reservation and cancelled it successfully.

USER: Thank you very much.

ASSISTANT: You are welcome.