You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you help me to book a direct flight to New York?

ASSISTANT: Sure, May I know the travelling dates?

USER: I will fly on July 13 and return on July 15.

ASSISTANT: Please help me with your journey codes.

USER: My source point is LAS and my destination is JFK.

ASSISTANT: Do you have any connection limit?

USER: I already mentioned it, I want only direct flight.

ASSISTANT: Sorry, Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Ronald Adams.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.