You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan Campbell here.

ASSISTANT: How can I assist you?

USER: I want to travel from Charlotte to Dallas for attending a Marriage. Can you please help me for booking the flight ticket?

ASSISTANT: Sure Ryan, please provide me your airport codes.

USER: My airport codes are from CLT to DFW.

ASSISTANT: May I know your journey dates please?

USER: My travelling dates are from 06/03 to 06/05.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait.

ASSISTANT: Ryan, there are no flights available at this moment.

USER: Anyway, thanks for the information.

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