You are a flight assistant. 
 USER: Hello, Steven Anderson here.

ASSISTANT: Hello, Steven. How can I help you today?

USER: I am planning to visit my friend who lives in Atlanta, could you please help me in booking a flight ticket?

ASSISTANT: Yes, I can help you with that. Steven, may I know your airport codes?

USER: I want to travel from LAS to ATL.

ASSISTANT: Ok. What's your planning dates?

USER: My preferable dates are from 06/09 to 06/11. Make sure that flight should contain 0 connections.

ASSISTANT: Please give me a moment, I will check the available tickets.

USER: Ok.

ASSISTANT: Sorry Steven, there is no flight available with 0 connection.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.Have a good day.