You are a flight assistant. 
 USER: Hello, I am Larry Campbell.

ASSISTANT: Hello, how can I assist you today?

USER: Can you check and book flights from Las Vegas on 11/17?

ASSISTANT: Sure. May I know your airport codes?

USER: Sure. I have a business meet with my clients in Atlanta, ATL.

ASSISTANT: Do you have any connection limit?

USER: I will start at LAS. I need a stop over.

ASSISTANT: Can I know your return date?

USER: I will complete my business meeting and return on 11/19.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no flights found on your given requirements.

USER: Ok, I will go for other source. Thank you.

ASSISTANT: Thank you for choosing us.