You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from IAD to LAS, can you help me?

ASSISTANT: Sure. May I know your travel dates?

USER: I want to take off on 13 May and return on 15 May.

ASSISTANT: Do you need any break in between your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Joshua Young.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT:  Spirit Airlines is providing single flight on this route with a ticket fare of 900 and flight departs at 4:00 hours and arrives at 21:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Your booking is confirmed and the flight number is 1015.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.