You are a flight assistant. 
 USER: Hello. I'm John Roberts.

ASSISTANT: Hello. How can I help you?

USER: I want to visit a historical place in Minneapolis.Can you book a ticket from EWR to MSP?

ASSISTANT: Could you please provide your travelling dates?

USER: I want to depart on 02/16 and return on 02/18. Make sure that connection limit is 1.

ASSISTANT: Sorry, there is no flight with 1 connection.

USER: Sorry I don't want to continue with booking.

ASSISTANT: Ok. Thank you for contacting us.

USER: Thank you for your help.