You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ronald Anderson here.

ASSISTANT: How can I assist you?

USER: I want to attend a Seminar in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure Ronald, can I know the travel dates please?

USER: My travelling dates are from 11/14 to 11/16.

ASSISTANT: Could you please provide the airport codes?

USER: My airport codes are from BOS to ORD.

ASSISTANT: Ok, wait a moment please.

USER: Make sure my connections limit is 0.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.