You are a flight assistant. 
 USER: Hello, I am Jacob Martin.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to visit white house at Washington, can you please book me a ticket?

ASSISTANT: Sure, for that I need to know your travelling dates. Can you provide it?

USER: Sure, my travelling dates are from 05/14 to 05/16.

ASSISTANT: May I know your fare preference?

USER: I can afford 1000.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need one halt in between journey.

ASSISTANT: Please share me your exact airport codes.

USER: My airport codes are from DFW to DCA.

ASSISTANT: Thanks for sharing details, wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your requested details.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us, have a nice day.

USER: Thanks for your help.