You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Myself James White. I am looking for a flight from DFW to IAD, can you help me in booking?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my planned travel dates are Aug 08 and Aug 10.

ASSISTANT: Do you have any connection limit for this trip?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Do you have any specific airline preference for this trip?

USER: No, make sure that I need a afternoon flight for the depart time.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: James White, we regret to inform you that there are no flight services available on this route with your preferences.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.