You are a flight assistant. 
 USER: Hello, I am George Hernandez.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit the Cloud Gate in Chicago, so could you aid me in booking a flight ticket to Chicago?

ASSISTANT: Sure, I will assist you with that. May I know the airport codes to book?

USER: Sure, my source and destination airport codes are DCA and ORD respectively.

ASSISTANT: Ok, please can I know the dates to check the availability?

USER: Sure, I would like to go on Sept 18th and return back on Sept 20th.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight ticket available with 1 connection limit and the airfare is 200. Can I book the flight 1022 for your dates?

USER: Ok, please proceed for further.

ASSISTANT: Ok, the flight ticket is been booked and the airlines is Southwest.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing our agency, have a safe journey.

USER: Welcome.