You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jeffrey Thomas, want to travel from ORD to BOS. Please help me in booking my tickt.

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are from 10/30 to 11/01.

ASSISTANT: Can I know your connection limit please?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: My departing time should be in afternoon.

ASSISTANT: Sorry to say, there is no flight with connection limit 0.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.