You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me to search a flight with 0 connection limit?

ASSISTANT: Sure, can you please share your nearest airport codes of travelling?

USER: The airport codes are from CA-OAK to DC-DCA.

ASSISTANT: May I know your planned dates of journey?

USER: The travelling dates are 01/07 to 01/09.

ASSISTANT: Meanwhile, please provide your name.

USER: Sure, my name is Katherine Perez.

ASSISTANT: Katherine Perez, there are no flight services available with 0 connection limit on this route.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.