You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to visit Denver city to meet my friend, can you please book me a ticket from IAD to DEN?

ASSISTANT: Sure, I am oblige to help you.

USER: Thank you.

ASSISTANT: Can you please provide your name please?

USER: My name is James Taylor.

ASSISTANT: Ok, may I know your preferable dates of travelling?

USER: My preferable journey dates are from 08/02 to 08/04.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Sure, I will wait for your response.

ASSISTANT: Based on your information, I have found flight with 1 connection with the fare of 100. Is it ok for you?

USER: Thant's ok for me, please reserve my ticket with this flight.

ASSISTANT: Ok, your ticket has been booked in flight number 1011 and airline is Frontier.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us, have a great journey.