You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am planning to book a ticket from HOU to DCA. Can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I am planning to travel on Apr 18 and return back on Apr 20.

ASSISTANT: Do you have any connection limit preference?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your class preference for this trip?

USER: I am ok with any class.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Justin Walker.

ASSISTANT: Southwest Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 5:00AM and arrives at 15:00PM, shall I book your ticket in this flight?

USER: That's fine, please proceed the booking.

ASSISTANT: Justin Walker, your ticket is booked in economy class of flight number 1012.

USER: Thank you for your service.

ASSISTANT: You are welcome and have a safe journey.