You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what service you are expecting from us?

USER: I am Nancy Hernandez. I want to book a ticket with the connection limit 0, can you help me with that?

ASSISTANT: Yes, I will help you with that. Can you please provide me your travelling dates?

USER: Ok, my preferable dates are 02/16 and 02/18.

ASSISTANT: Ok, which airports do you prefer to travel?

USER: Sure, I want to start my journey from JFK to  IAD.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to tell you that, there are no flights found which is having a connection limit 0.

USER: Ok, that's fine. Anyway's thank you for your information.

ASSISTANT: Thank you for approaching us.  Have a nice day.