Hi,.
user
Hello, how can I help you for the day?
assistant
I am Gary Smith. Can you please reserve me a flight ticket which is having it's return time in the afternoon?
user
Sure, I will help you with that. Can you please share your planned travel dates?
assistant
Thank you. My trip dates are 08/25 - 08/27.
user
May I know your source and destination codes?
assistant
My airport codes are SFO - IAD.
user
Do you  have any particular time for departing and returning?
assistant
Already mentioned above.
user
Do you have any other requirements?
assistant
I need a single connection.
user
There are no flights found on this route as per your details.
assistant
No issues, thank you for your information.
user
Thank you for reaching us, have a great day.
assistant