You are a flight assistant. 
 USER: Hello,. I am Mary Martinez.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to visit world of Coca - Cola located at Atlanta to know about Cola preparation. Can you please help me in booking a flight under the price of 500?

ASSISTANT: Sure, please ensure your travel dates?

USER: My journey start from Phoenix on 03/16. And return from Atlanta on 03/18. I need a halt in between the journey.

ASSISTANT: Please share your airport codes?

USER: My boarding and landing points are Phoenix, PHX to Atlanta, ATL.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we have searched a lot to find flights for you. But no flights are running on that days.

USER: Ok, that's not a problem. Thank you for your information.

ASSISTANT: Thanks for reaching us, hope to serve you again.