You are a flight assistant. 
 USER: Hi. I am Samuel Nelson.

ASSISTANT: Hello. How may I assist you Nelson?

USER: I want to attend a live event in Las Vegas.Can you help me to book a ticket from DFW on 03/27?

ASSISTANT: Sure, can I have your return journey date along with destination?

USER: I would like to return on 03/29. My nearest destination airport code is LAS.

ASSISTANT: Please wait a moment, let me check the flight availability.

USER: Sure, take your own time.

ASSISTANT: Thanks for your time, we have a flight on Frontier airline with connection 1. Shall I proceed?

USER: I am comfortable with this flight. Book this ticket for me.

ASSISTANT: Fine, your ticket has been done with flight number 1028.

USER: Thank you for helping me.

ASSISTANT: Welcome, have a good day.