You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Can you please book a flight ticket from BOS to DCA?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My trip dates are 04/02 and 04/04.

ASSISTANT: Do you want a connecting flight?

USER: No, I prefer a direct flight.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your good name?

USER: Anna Scott.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for visiting us.