You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me to book a flight ticket from DCA to ATL?

ASSISTANT: Sure, can you please share your journey dates?

USER: My travelling dates are Apr 11 to Apr 13.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Let me know your name to proceed further?

USER: Alexander Mitchell.

ASSISTANT: We found a United airlines, flight number-1013 connections-1 class-economy and fare is 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.