You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a ticket from ORD to DEN. Could you book a ticket?

ASSISTANT: Sure, when would you like to depart and return?

USER: Travelling dates are July, 20 and July, 22.

ASSISTANT: Do you need halt in between your journey?

USER: I need a halt.

ASSISTANT: Is there any class preference?

USER: I prefer economy class ticket.

ASSISTANT: May I know your name please?

USER: I am Joshua Wright.

ASSISTANT: Do you have any other requirements?

USER: Make sure my return time should be afternoon.

ASSISTANT: Ok, we found an UA airline, flight number: 1005, price: 200 with one connection. Shall I proceed to booking?

USER: Please book a flight.

ASSISTANT: Your flight ticket has been reserved in economy class.

USER: Thanks.

ASSISTANT: Thank you for choosing us.