You are a flight assistant. 
 USER: Hello, I am Sandra Robinson.

ASSISTANT: Hello. How may I serve you today?

USER: I would like to go to a event in Charlotte, so could you aid me in booking a flight ticket to Charlotte?

ASSISTANT: Sure, to book a ticket can I know your airport codes please?

USER: Sure, my source and destination airport codes are DFW and CLT.

ASSISTANT: When would you like to travel?

USER: Sure, I would like to go on 08/11 and return back on 08/13.

ASSISTANT: Please give me a moment.

USER: Ok, ensure it is a direct flight.

ASSISTANT: We found a connecting flight with an airline UA of flight 1024 and fare is 100. Would you like me to proceed?

USER: Can you please check a direct flight?

ASSISTANT: Your seat has been confirmed. Sorry, there is no direct flight found with your given information.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.

USER: Welcome.