You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Clark.

ASSISTANT: How can I assist you at this moment?

USER: I would like to visit DCA for enjoying holidays, can you help me to book a flight ticket from ATL?

ASSISTANT: Sure, I will help you with this. Could you please provide your preferable journey dates?

USER: I am travelling from Apr 11 to Apr 13.

ASSISTANT: Do you need any lay by for this trip?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Scott Clark, we regret to inform you that there are no flight services available on this route on your provided dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.