You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please help me in booking flight ticket from DTW to LAS to attend an event.

ASSISTANT: Sure, can you please provide me with your dates of journey?

USER: My trip dates are Dec 14 to Dec 16.

ASSISTANT: May I know your good name please?

USER: David Smith.

ASSISTANT: Do you have any other specifications please?

USER: I prefer to travel in connecting flight.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: I found a connecting flight of fare 100 with the Spirit airline, shall I proceed with this booking?

USER: You can book.

ASSISTANT: Ok, I have confirmed your ticket with the flight number 1020.

USER: Thank you.

ASSISTANT: You are welcome, have a safe journey.