You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you out?

USER: Can you help me to book a flight ticket from DCA to IAD?

ASSISTANT: Sure, I am happy to help you. When are you planning to make your journey?

USER: My trip dates are Sept 22 and Sept 24.

ASSISTANT: Do you have any break in between journey?

USER: Yes, I prefer break in between my journey.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: Can I have your good name?

USER: I am Dorothy Hill.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.