You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joshua Clark. I am Planning to travel on 11/22. can you help in booking ?

ASSISTANT: Sure Joshua. Please provide me your respective airport codes.

USER: I want to takeoff the flight from ATL.

ASSISTANT: Can you let me know your destination airport code?

USER: My destination airport code is MSP.

ASSISTANT: May I know your return date of journey?

USER: I will return on 11/24.

ASSISTANT: Clark, there are no flights available with your requested dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us, have a good day.