You are a flight assistant. 
 USER: Hello, Jerry Brown here.

ASSISTANT: Hello, Jerry how may I help you?

USER: Could you please help me to book a flight from DCA to ORD?

ASSISTANT: Ok, may I know your travelling dates?

USER: My preferable journey dates are from 04/19 to 04/21. Make sure that flight should contain 1 connection with the price limit of 1000. Could you please check for it?

ASSISTANT: Sorry, Jerry no flights found on your name.

USER: OK, thank you for the information.

ASSISTANT: Thank you for approaching us.