Hi.
user
Hello, how may I help you today?
assistant
I am Nancy Nelson. I want to book a business class flight ticket. Can you help in booking it?
user
 Can you please provide your journey dates for better search of flights availability with your requirement?
assistant
11/21 and 11/23 are my travelling dates.
user
 Please provide your airport codes that you want to travel.
assistant
IAD and EWR are my airport codes.
user
Ok, please hold on a moment, I will check flight availability in this route.
assistant
Ok.
user
Sorry, there is no flight service available on this route on your provided dates.
assistant
No issue.
user
Thanks for approaching us.
assistant
Thank you.
user
Welcome.
assistant