Hi.
user
Hello. How may I assist you?
assistant
Could you please book a ticket from Washington DC-IAD to Las Vegas, NV-LAS.
user
Sure, I am here to help you out. May I know your travelling dates please?
assistant
My travelling dates are from 04/04 to 04/06.
user
May I know your name please?
assistant
My name is Jack Walker.
user
Jack Walker, there are no flights available in your route.
assistant
Thank you.
user
Thank you for reaching us.
assistant