You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Anna Green. I am planning to book a ticket to attend a meeting at LGA. Can you please help em out to book a ticket from DCA?

ASSISTANT: Sure, I can help you in that booking. Can I know your travel dates?

USER: I would like to travel on 01/05 and return back on 01/07.

ASSISTANT: Please allow me a moment.

USER: Make sure my price limit is 200. Sure, I will wait for your reply.

ASSISTANT: Thank you for waiting, there is no flight for you on the trip dates to book a flight ticket to reach your destination.

USER: That's not a problem, thank you for your information.

ASSISTANT: You are most welcome and thank you for reaching us. Have a nice day.