You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a flight ticket from DTW to LAS.

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

USER: My journey dates are from Apr, 21 to Apr, 23.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a single connecting flight.

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

USER: No.

ASSISTANT: Can I have your name to proceed further?

USER: Stephen Lee.

ASSISTANT: We found a Delta airlines, flight number-1012 connections-1 class-economy and fare is 200.

USER: Please proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.