You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Young.

ASSISTANT: How can I assist you now?

USER: I am looking to book a plane ticket with 1 connection, could you please help me out?

ASSISTANT: Sure, I will help you with that. Can you please mention the traveling dates of your journey?

USER: Sure, my planned trip dates are from 09/23 to 09/25.

ASSISTANT: Ok, may I know the airport codes please?

USER: Sure, my airport codes are from DCA to DEN.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight 1001 in Southwest airline has the price 100 and the connection limit is 1.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us, have a nice day.