You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I need you to book a flight ticket form IAD to HOU.

ASSISTANT: Sure, may I know your travel dates please?

USER: January 1 and 3 are my planned travel dates.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: May I know your airline preference?

USER: I need a normal-cost airlines to fly.

ASSISTANT: Do you have any other specifications?

USER: Nothing much to state.

ASSISTANT: May I know your name to proceed further?

USER: My name is Linda Lee.

ASSISTANT: United Airlines is providing you the connecting flight in economy class, shall I proceed?

USER: Please book the ticket.

ASSISTANT: Your ticket has been reserved with flight-1003.

USER: Thank you.

ASSISTANT: My pleasure.