You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you.

USER: I am heading to DCA to participate in Football match. Can you book me a ticket from IAD?

ASSISTANT: May I know your trip dates?

USER: My departure is on Dec 29th and return is on Dec 31st.

ASSISTANT: Do you require your specifications?

USER: Yes, I need a direct flight.

ASSISTANT: There is a direct flight in Spirit airlines with the fare 200.

USER: Fine, please proceed.

ASSISTANT: Your booking is done.

USER: Thanks for your support.

ASSISTANT: May I know your name?

USER: I am John White.

ASSISTANT: Thank you.