You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please help me to book a flight ticket from IAD to ATL.

ASSISTANT: Sure, we are happy to help you. May I know your travelling dates?

USER: My journey dates are Mar, 5 and Mar, 7.

ASSISTANT: Do you prefer any break in between journey?

USER: Yes, I need a break.

ASSISTANT: Are there any other specifications for you?

USER: I need to depart at afternoon time.

ASSISTANT: May I know your good name?

USER: Michael Carter here.

ASSISTANT:  Sorry, no flights are available on your journey routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.