Hello, I am David Roberts.
user
Hello, How can I help you?
assistant
I need to attend a science festival and present my research at Washington, DC-DCA.
user
Sure, May I know the source code?
assistant
Sure, my source airport code is from Philadelphia, PA-PHL.
user
Please help me with your travel dates.
assistant
Sure, my departure is on 09/23 and arrival is on 09/25.
user
Please wait a moment.
assistant
Sure.
user
Sorry, No flights found with your preferable dates.
assistant
No problem, I will choose another alternative to reach my destination. Thank you for the information.
user
Thank you for availing us.
assistant