You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, can you share your trip dates?

USER: My travelling dates are 09/12 and 09/14.

ASSISTANT: Do you have any preferences?

USER: I want to return on afternoon.

ASSISTANT: May I know your journey airport codes?

USER: My airport codes are BOS and EWR.

ASSISTANT: Give me a minute.

USER: Ok, I need single connecting flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.