You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I'm Shirley King. I am planning to visit time Square at Houston, can you please help me with booking a flight ticket?

ASSISTANT: Sure King, can I know the airport codes please?

USER: My origin airport code is DCA and the destination airport code is IAH.

ASSISTANT: May I know your travel dates please?

USER: Sure, I would like to take off on 12/31 and return back on 01/02.

ASSISTANT: Ok, wait a moment please.

USER: Ok, but please make sure that the price limit should not exceed 500.

ASSISTANT: I found a flight with price 100 in Southwest airline, shall I book it?

USER: Yes, please proceed with the booking if the connection limit is 1.

ASSISTANT: Your ticket has been booked with flight number 1028.

USER: I appreciate your help, thank you.

ASSISTANT: You are welcome.