You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I am planning to visit Denver Zoo on 12/05. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, how much you can afford for this trip?

USER: My budget is only 200.

ASSISTANT: When do you want to return back?

USER: I want to return back on 12/07.

ASSISTANT: May I know your halt limit?

USER: Yes, I want the flight with 1 connection limit.

ASSISTANT: What are your airport codes?

USER: The airport codes are from NY-EWR to CO-DEN.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, Currently there are no flights to your destination.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: May I know your name, please?

USER: Sure, my name is Susan Evans.

ASSISTANT: Thanks for reaching us, hope we serve you next time.

USER: Thank you for your information.