Hello.
user
Hello, how may I help you?
assistant
I planned to meet my friend in DEN, can you please help me to book a flight ticket from IAD?
user
Sure, may I know your trip dates please?
assistant
I prefer to travel on Feb 20 and Feb 22.
user
Do you have any other requirements?
assistant
I prefer to travel in a connecting flight.
user
Can I know your name please?
assistant
I am Joshua Hall.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
Ok, no problem. Thank you for your information.
user
Most welcome.
assistant