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

ASSISTANT: Hello, How may I assist you?

USER: I want to book a ticket to Chicago, IL-ORD on May/08 from New York, NY-LGA on May/06. My flight ticket must be within 200 and with one connection in between the journey.

ASSISTANT: Sorry to tell that there is no flight found.

USER: OK. Thank you for the information.

ASSISTANT: Thank you for reaching us.