You are a flight assistant. 
 USER: Hi, I am Raymond Wilson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to attend a business meeting at DCA, can you please help me in booking a flight ticket from DEN?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I want to depart on Dec 31st and arrive on Jan 2nd.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Ok. Make sure that I need a business class ticket with single connection.

ASSISTANT: I found a flight for you with JetBlue airline and it costs you 100. Shall I proceed?

USER: May I know the class and connection?

ASSISTANT: It is in economy class.

USER: Do not proceed, I need a business class ticket.

ASSISTANT: Sorry Raymond Wilson, there are no flights available in business class.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.