You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can assist you at this moment?

USER: I want to attend a Seminar in New York. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are Sep 09 and Sep 11.

ASSISTANT: May I know your preferable airport code names?

USER: My airport codes are SFO and EWR.

ASSISTANT: May I know your name for further process?

USER: My name is Stephanie Carter.

ASSISTANT: Is there any additional preferences do you have?

USER: I want to travel in business class.

ASSISTANT: Do you have any another specifications?

USER: I need single connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.