You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: George Hill here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking the ticket from DFW to CLT?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: Sure, my journey dates are 08/09 and 08/11.

ASSISTANT: Wait a moment please.

USER: Sure, I'll wait.

ASSISTANT: George Hill, there are no flight services available on your requested dates on this route.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.