You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you.

USER: My name is William Gonzalez, I want to book a flight ticket.

ASSISTANT: Sure, we are help to you, could you please provide me your journey points and dates?

USER: Sure, I would prefer to travel to Atlanta GA - ATL from Washington DC - DCA. And my dates of departure is on 12/24 return 12/26. And please make sure I would prefer single connection and price limit should not exceed 1000.

ASSISTANT: OK, please give me a moment.

USER: Sure.

ASSISTANT: I will check and get back to you. Thanks for your waiting, I am sorry to say that we found no flight on your root.

USER: OK, thanks for your assistance.

ASSISTANT: Thank you for choosing us, have a nice day.