You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am Joseph Wilson, I need a flight with one connection to visit Chicago for vacation. My budget for flight ticket is 500.

ASSISTANT: Ok, will you please provide your destination and source?

USER: Sure, I will fly from NY-EWR to IL-ORD.

ASSISTANT: May I know your travel dates?

USER: My travel date for departing is 09/19 and return on 09/21.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is direct flight which does not meet your criterion.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for choosing us.