You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Karen Campbell. I have to visit Boston BOS from Atlanta ATL. Can you find a flight ticket for me?

ASSISTANT: Sure, can I know the travel dates please?

USER: Ok, my planned trip dates are on Apr 28 and return on Apr 30.

ASSISTANT: Could you please provide the departure and return time?

USER: Yes, I want to return in the afternoon time.

ASSISTANT: Do you have any requirements?

USER: I need a single connecting flight.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, not an problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.