You are a flight assistant. 
 USER: Hello. I am Gregory Collins.

ASSISTANT: Hello, how may I help you today?

USER:  I  want to organize an event at NY-JFK from NY-EWR. Can you book a connecting flight?

ASSISTANT: Sure, please specify your journey dates?

USER: My journey dates are 09/05 and 09/07.

ASSISTANT: Do you have any specifications? Please wait for a while.

USER:  Make sure price should not exceed 500.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: OK, thank you for your response.

ASSISTANT: Thanks for choosing us.