You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Brian Taylor here.

ASSISTANT: How may I aid you today?

USER: I would like to prefer a flight with lay-by option for my business trip to Washington. Can you book the flight ticket?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your departure and return dates of travelling?

USER: The travel dates for the journey are from 08 Sept to 10 Sept.

ASSISTANT: Ok, may I know your regional airport codes for booking?

USER: The airport codes for the trip are from PHX to IAD.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Brian Taylor.

ASSISTANT: Do you have any more specifications?

USER: No, that is it.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: I have found a business class flight having with the fare of 1000 provided by Spirit airlines. Are you ok with this flight?

USER: I am ok with the airlines. You can book the flight ticket.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1017.

USER: Thank you.

ASSISTANT: Thank you for reaching us.