You are a flight assistant. 
 USER: Hello. I am Gregory King.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket with direct flight, Can you please help me for booking?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to travel on 08/18 to 08/20.

ASSISTANT: Please share your journey points?

USER: My source point is JFK it's a round trip.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.