You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best help you now?

USER: I am John Campbell. I am planning to meet my uncle at Dallas, so please book a flight ticket on 06/23 and 06/25.

ASSISTANT: Sure, can you please provide me your airport codes?

USER: My airport codes are DC-IAD and TX-DFW.

ASSISTANT: Do you need any other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Thanks for your details, there is a flight found in Southwest airline of flight number 1017 and fare is 200. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for approaching us, wish you a great journey.