Hello.
user
Hello,. What kind of help can I provide to you?
assistant
Myself David Garcia.
user
Ok.
assistant
I want to book a flight from DFW to IAD.
user
Sure, Can you mention your journey dates?
assistant
My preferable dates are from 08/17 to 08/19.
user
Ok, Please wait for a couple of minutes.
assistant
Sure, take your time.
user
 Thanks for waiting, there are no flights available at this moment matching your particulars.
assistant
Ok, no problem thank you.
user
Thanks for your presence.
assistant