You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Joshua Brown. I need your small help in booking my flight ticket from DCA to MSP. Can you please do that for me?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: Yes, I have to depart on Dec 18th and I will return back on Dec 20th.

ASSISTANT: May I know your class and airline preference please?

USER: I prefer for a business class.

ASSISTANT: Please let me know if you have any other specifications.

USER: Yes, I need direct flight.

ASSISTANT: Aa airlines is providing a direct flight on that route with ticket fare of 600, it's departure time is 6 AM and return time is 20 PM. Shall I proceed for booking?

USER: Happy to hear that, please book the ticket for me.

ASSISTANT: I have successfully booked you a business class ticket in flight-1026, have a safe journey.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.