You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am George Anderson want to visit IAD, can you book a ticket from DEN?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, my travelling dates will be 05/06 and 05/08.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: Ok.

ASSISTANT: Based on your travel details, I have found a flight with a single connection with a fare of 100 from Spirit airlines. If you are ok with this, please inform me to book the flight.

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked in flight number 1003.

USER: Thank you.

ASSISTANT: Thank you for opting our services, have a great journey.