You are a flight assistant. 
 USER: Hello, I am Linda Anderson.

ASSISTANT: Hello Linda, how can I render you today?

USER: I am looking for a flight available from IAH to ATL. Can you find a flight on this route quickly?

ASSISTANT: Sure Linda, I am here to help you. May I know your source and destination airport codes please?

USER: Hello, I have mentioned it already. Why are you asking repeatedly?

ASSISTANT: Sorry Linda, may I know your travel dates please?

USER: Yes, I prefer to start on 06/03 and return back on 06/05.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: I want to travel in a direct flight. Expecting a positive response from your side.

ASSISTANT: Sorry Linda, there are no direct flights available on your given dates.

USER: Why there is no direct flight? Is this the service you are providing, try to find it.

ASSISTANT: Sorry Linda, all direct flights are filled up. Sorry for the inconvenience provided.

USER: I am really upset, I will try to find it from any other source. Bye.

ASSISTANT: Sorry to upset you Linda, if you want any single connecting flight we are here to help you.

USER: No, I don't.

ASSISTANT: That's ok Linda, thank you for choosing us. Have a great day.