You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donald Allen here.

ASSISTANT: Allen, how may I assist you?

USER: I would like to meet my close friend at Atlanta, please help me in booking a ticket from DCA to ATL.

ASSISTANT: Sure, I will do that for you. Could you please provide me your travel dates?

USER: My planned journey dates are 03/29 and 03/31.

ASSISTANT: There is a flight available with Spirit airlines and the ticket fare is 200 only. Is that ok for you?

USER: Ok, please proceed for booking.

ASSISTANT: Allen, your ticket is confirmed successfully and your flight number is 1015.

USER: Thank you for choosing us.

ASSISTANT: You are welcome and thank you for choosing us.