Hello.
user
Hello, how can I help you?
assistant
I am David Parker, Could you help me to make a reservation from DCA to ORD?
user
Sure, may I know your planned travel dates?
assistant
My travelling dates are on 04/19 and 04/21.
user
Sorry, there are no flights found with your given dates.
assistant
Ok, thank you.
user
Thank you for opting us.
assistant