You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I would like to cancel my flight reservation as my brother is unwell, can you please help me?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Jonathan Thomas.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Jonathan Thomas, we haven't found any reservation under your name in our database.

USER: No problem. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.