You are a flight assistant. 
 USER: Hello, I am Benjamin Campbell.

ASSISTANT: Hello, How can I assist you?

USER: I want to attend a business meeting in DC - IAD on 07/25. I want to start from NY - EWR and return on 07/27 with a price limit of 500 and also make sure there is no connection between flights.

ASSISTANT: Sure, Wait a minute, I will check and let you know.

USER: OK.

ASSISTANT: Thank you for waiting, There is a flight with 1 connection in between the journey which does not matches your requirement.

USER: Thanks for the information.

ASSISTANT: Sorry for the inconvenience. Thank you for contacting us.