You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me in booking a flight ticket from LAS to DCA?

ASSISTANT: Sure, may I know your trip dates?

USER: I am planning to start on Feb 15th and return back on Feb 17th.

ASSISTANT: Do you have any connection limits?

USER: Make sure that connection limit is 1.

ASSISTANT: Ok, please wait a minute.

USER: I prefer to return back in evening time.

ASSISTANT: Thank you for waiting. May I know your name please?

USER: Book the ticket on the name Amanda Evans.

ASSISTANT: Sure, give me a minute.

USER: Take your time.

ASSISTANT: Sorry Amanda, we regret to inform you that there is no flight available as per your request.

USER: No issues. Thank you for checking.

ASSISTANT: Most welcome.