You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me in helping to book a flight ticket from DCA to LAS?

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

USER: My trip dates will be May 11th to May 13th.

ASSISTANT: Do you have any particular time for departing and returning?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Frank Moore.

ASSISTANT: Is there any airline preference?

USER: I prefer a normal cost airline.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: United Airlines are providing a flight-1028 with single connection limit and the ticket price is 200. Shall I proceed?

USER: You can proceed.

ASSISTANT: Frank Moore, your booking has been done in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a great day.