Hi.
user
Hello, do you need any help from us?
assistant
Yes, I would like to book a flight ticket from  to attend a robotic workshop at Atlanta. Can you help me to book an business class ticket?
user
Sure, could you please share your departure and arrival day?
assistant
Yes, I want to depart on June 25 and intend to return on June 27.
user
Ok, may I know your origin location airport code?
assistant
Yes, it is  SFO.
user
Ok, could I have your name please?
assistant
Yes, my name is Robert Clark.
user
Ok, do you need direct or connecting flight?
assistant
I need a direct flight.
user
Ok, do you have any other specifications?
assistant
No.
user
Sorry, there is no flight on your requested travelling dates.
assistant
That's ok, thank you for the response.
user
You are welcome, have a great day.
assistant