You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Green here.

ASSISTANT: How can I aid you?

USER: I would like to attend an important seminar in Las Vegas, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: May I know your airport codes please?

USER: Sure, I will prefer DFW and LAS as my origin and destination airport codes respectively because those airport codes are near and convenient for me to travel.

ASSISTANT: May I know your preferable journey dates please?

USER: I would like to start my journey on 10/14 and also please book my return ticket on 10/16.

ASSISTANT: Wait a moment please.

USER: Ok, take your time.

ASSISTANT: Delta airlines is available in your route with the ticket fare of 100, shall I proceed with the booking?

USER: That's fine for me, I am ok with this. You can proceed with booking.

ASSISTANT: Your ticket is booked with the flight-1006.

USER: Thank you for your great assistance in booking of my ticket.

ASSISTANT: Thank you for approaching us.