Hello.
user
Hello.
assistant
Brian Wilson here.
user
Brian Wilson, how can I aid you today?
assistant
Can you please help me in booking a flight ticket from SFO to JFK?
user
Sure, I am here to help you. May I know your travel dates please?
assistant
Sure, my travel dates are from May 18 to May 20.
user
Ok, hold on for a moment. Let me check the best flight for you. I found a flight for you with Delta airline and it costs you 200. Shall I proceed?
assistant
Please make sure that my return time must  be in the evening.
user
Sorry Brian Wilson, there are no flights available on evening time in those routes. Sorry for the inconvenience provided.
assistant
That's ok, no problem. Thank you for the information.
user
Welcome, thank you for choosing us. Have a great day.
assistant