Hello.
user
Hello.
assistant
I have a plan for the trip, so please help me to book a flight ticket from DEN to DCA.
user
Sure, I can help you with that. Can you please help me with your travelling dates?
assistant
Sure, the travelling dates are 07/19 and 07/21.
user
May I know your name to proceed further?
assistant
My name is Ryan Thompson.
user
Thank you for providing. Ryan, I am  sorry to inform you that there is no flight available at your requested dates.
assistant
It's ok. Thank you for your service.
user
You are welcome. Thank you for contacting us.
assistant