You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need a direct flight to reach Atlanta on Dec 7th, so please help me in booking a flight.

ASSISTANT: Sure, May I know your airline preference?

USER: I prefer a normal-cost airline.

ASSISTANT: Ok, when do you want to return?

USER: I intend to return on 9th of the same month.

ASSISTANT: Ok, Kindly mention your journey airport codes.

USER: My airport codes are DFW - ATL.

ASSISTANT: Ok, Do you have any class preference?

USER: I need a flight in economy class.

ASSISTANT: Ok, Do you have any other requirements related to booking?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, there were no flights found with your given details.

USER: Ok, not a problem.

ASSISTANT: Ok, May I know your name for documentation purpose?

USER: Sure, my name is Ryan Rodriguez. Thank you for your service.

ASSISTANT: Ok, Thank you for choosing us.