You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to visit Las Vegas LAS from Washington DCA. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help you with that flight ticket booking. Can you please share your preferable travel dates?

USER: Ok, my planned trip dates are on May 24 and return on May 26.

ASSISTANT: May I know your name please?

USER: Sure, myself Rebecca Young.

ASSISTANT: Do you have any class preference?

USER: I would prefer business class.

ASSISTANT: Do you need a connecting flight or direct flight in your journey?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Is there any other specifications?

USER: Yes, I need a single connecting flight.

ASSISTANT: Sorry to say that, there are no flight found on this route as per your details.

USER: That's fine, no problem.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your information.