You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket from ATL to LAS?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are Dec 17 to Dec 19.

ASSISTANT: May I know your name for further process?

USER: Frank Lewis here.

ASSISTANT: Let me know your connection limit.

USER: I need a single connection of flight.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.