You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Nicholas Taylor. Can you please help me with book a ticket from LAS - ATL?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please let me know your journey dates.

USER: My journey dates are 08/17 to 08/19.

ASSISTANT: Do you need any other preference?

USER: I need a direct flight.

ASSISTANT: Ok, let me check the availability of direct flights on your route.

USER: Ok.

ASSISTANT: Sorry Nicholas Taylor, there is no flight available on your route.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.