Hello, Kenneth Wilson here.
Hello. How may I assist you today?
 I want to do research on a project at NASA space center. Please make me a plane reservation with in price 200.
Sure, I am gleeful to assist you. When are you planning to make your journey?
I am planning to start on 04/22 and come back on 04/24.
May I know at what price you are looking for ticket?
I can pay up to 200.
Do you prefer any halt in between journey?
Yes, I need a break.
Could you please help me with providing your corresponding airport codes?
I would like to fly out from PHX and reach DCA.
Ok, Just wait for a while.
Ok.
 Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.
That's Ok, thanks for the information.
Thanks for opting us.