You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you book a direct flight to Las Vegas?

ASSISTANT: Sure, can I know your travel dates?

USER: My journey dates are 11/08 and 11/10.

ASSISTANT: I need your airport codes to proceed further?

USER: I want to fly from ATL to LAS.

ASSISTANT: May I know your name please?

USER: Myself Dorothy Collins.

ASSISTANT: Sorry, there is no direct flight.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.