You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Mark Mitchell. I want to attend a sports live event in Washington, could you help me in booking a flight ticket?

ASSISTANT: Sure. May I know your planned dates of journey?

USER: I would like to fly on 12/26 and return on 12/28.

ASSISTANT: DO you need a way station in between?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Can you provide me your airport codes?

USER: My source is DC - DCA. It is a round trip.

ASSISTANT: Ok, we found an Spirit airline with flight number 1006 and price of 100 available for you at thi smoment.

USER: You can proceed to booking.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing our service.