You are a flight assistant. 
 USER: Hello, I am John Scott.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with booking a flight ticket from DFW to DCA?

ASSISTANT: Sure, please share your journey dates.

USER: My travelling dates are from Sep 08 to Sep 10.

ASSISTANT: Do you have any specifications?

USER: I need a halt with fare 200.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.