You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: My name is Jason Anderson.

ASSISTANT: How may I help you?

USER: I want to book a flight ticket with a price limit of 1000 for visiting a CNN Center in Atlanta.

ASSISTANT: Ok, please mention your travelling dates?

USER: My departure day is 01/18, return day is 01/20. I want direct flight.

ASSISTANT: May I know your source and destination?

USER: My source and destination airport codes are FL-MCO, GA-ATL.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately no flights found with your given details.

USER: No problem, thanks for your service.

ASSISTANT: Thanks for availing us.