Hi. I am Mary Lopez.
user
Hello, how can I help you?
assistant
I am looking for a flight from DCA to LGA,  can you help me out?
user
Sure, can you share your trip dates?
assistant
My trip dates are from Jul 18th till Jul 20th.
user
Do you have any specifications?
assistant
I need my return flight in evening session.
user
Do you have any other preferences?
assistant
I am looking for a connecting flight.
user
There is  a connecting flight with number 1015 in airline Southwest, the fare is 100 in economy class. Can I book it?
assistant
Please proceed with it.
user
Your ticket is reserved, the depart time is 12:00 PM and return time is 23:00 PM.
assistant
Thank you for your help in booking the flight ticket.
user
Thank you for reaching us.
assistant