Hello.
user
Hello, how may I help you?
assistant
I am planning to visit Oakland for my sisters marriage, can you please help me in booking a flight ticket from DCA?
user
Sure, may I know your trip dates please?
assistant
Sure, my trip dates are July 28 and July 30.
user
Do you have any other requirements?
assistant
Yes, I prefer economy class with 1 stop over in between my journey.
user
Can I know your name please?
assistant
Janet Campbell here.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
Make sure my depart time should be during afternoon. That's ok, not an issue. Anyways thank you for checking.
user
Most welcome.
assistant