You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for this moment?

USER: I am Margaret King want to visit Denver, can you book a ticket from IAD to DEN?

ASSISTANT: That's really great, can you please let me know your dates of journey?

USER: Sure, my travelling dates will be 09/30 and 10/02.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: There is a flight with the connections limit 1 of fare 200 as per your requested criteria. Can I book this ticket?

USER: Yes, you can book.

ASSISTANT: Your booking is done with the Southwest airline.

USER: Thank you.

ASSISTANT: You are welcome and have a safe flight.