You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to book a ticket from DCA to ATL, can you please help me out?

ASSISTANT: Sure, I am here to help you. May I know on what dates would you like to travel?

USER: I am travelling on these dates Dec 21st and 23rd.

ASSISTANT: May I know your name?

USER: Virginia Roberts here.

ASSISTANT: Do you have any connection limit?

USER: I need single connection limit.

ASSISTANT: Is there any preferences?

USER: I don't have any other preferences.

ASSISTANT: Here, there is a flight with 1 connection in Frontier airlines and price is 100. Shall I book?

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket has been booked with the flight 1007.

USER: Thank you for your services.

ASSISTANT: Thank you for choosing us.