Hi.
user
Hello. How can I assist you at this moment?
assistant
I want to book a ticket from IAD to LAS. Could you book a ticket?
user
Sure, I am here to help you. Can you please provide your journey dates?
assistant
Departure is on May, 30 and return is by June, 1.
user
Do you have any connection limit preference?
assistant
I would be comfortable with single stop over.
user
Do you have any other specifications for this trip?
assistant
I prefer to fly in a business class.
user
May I know your name to proceed further?
assistant
My name is Charles Hill.
user
Charles Hill, there are no flight services available on this route with your preferences.
assistant
Thank you.
user
Thank you for contacting us.
assistant