You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carolyn Green here.

ASSISTANT: How can I help you today?

USER: Please help me out in booking the ticket from ATL to IAD.

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

USER: My trip dates will be Jan 7 to Jan 9.

ASSISTANT: Do you have any class preference for this trip?

USER: Business class I will prefer.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, 1 connection limit.

ASSISTANT: Do you have any other specifications for this trip?

USER: My return time must be in the afternoon.

ASSISTANT: May I know your good name please?

USER: Above mentioned.

ASSISTANT: Carolyn Green, there are no flight services are available on this route on your provided dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us.