You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Robert Thomas here. I want to book a flight from DEN to BOS for my short film shooting.

ASSISTANT: May I know your travel dates?

USER: My preferable dates are from 04/23 to 04/25.

ASSISTANT: There is a flight-1014 with United airlines, shall I proceed for booking?

USER: Make sure that connection limit is 0.

ASSISTANT: No, there is no flight with 0 connection.

USER: That's ok. Don't book the ticket.

ASSISTANT: Ok. Thanks for reaching us.

USER: Thank you for your service.

ASSISTANT: Have a nice day.