You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you reserve me a ticket from DEN to DCA?

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

USER: My journey dates are Feb 21 to 23.

ASSISTANT: Ok, please specify your name.

USER: Laura Baker here.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other concerns to say?

USER: I prefer normal-cost airline.

ASSISTANT: We found a direct flight with a fare of 200 in 1002 Hawaiian Airlines, shall I proceed?

USER: Ok, proceed.

ASSISTANT: Ok, your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.