You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a ticket from ORD to LAS. Could you book a ticket?

ASSISTANT: Sure, I am glad to help you in booking your flight ticket. Can you please provide your scheduled dates of journey?

USER: Departure is Sept, 2 and return date is Sept, 4.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I prefer connecting flight.

ASSISTANT: Is there any other specification for your journey to met with can you please provide it?

USER: I would like to return in the afternoon.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: My name is Kathleen Moore.

ASSISTANT: Sorry to say this Kathleen Moore, there are no flights which travels to your region on your planned dates of journey.

USER: Thank you.

ASSISTANT: You are welcome, thank you for employing our service. Have a safe journey.