You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda King here.

ASSISTANT: King, how can I assist you today?

USER: I want to travel from CLT to AUS for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: I can help you with that, can you please tell me your journey dates?

USER: My departure date is 10/22 and return date is 10/24. Make sure my price limit is 200.

ASSISTANT: Ok, please wait for a while. I will check for the available flights and get back to you.

USER: Ok, I will wait.

ASSISTANT: Sorry King, there are no flights available on your preferred dates.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us and have a nice day.