You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Samantha Smith. I would like to travel to New York with direct flight, can you please help me out?

ASSISTANT: Sure, I will help you with that. Can you please mention your travel dates for booking flight ticket?

USER: I am travelling on these dates 09/16 and 09/18.

ASSISTANT: May I know your preferable airport code names for further process?

USER: I am flying from IAD to JFK.

ASSISTANT: Ok, please hold on amoment, I will check flight availability in this route.

USER: Sure.

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

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome.