You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Carol Hall here. I need your help in booking the ticket from DCA to OAK, to meet my grandparents in Oakland.

ASSISTANT: Please provide your trip dates.

USER: My journey dates are from 01/25 to 01/27.

ASSISTANT: I got a flight for you with 1 connection. Can I proceed?

USER: Please check that flight has 0 connection limit. Ok, don't book.

ASSISTANT: Sorry, but for these location no direct flight is available. Ok. Thank you to visit us.

USER: Ok, thank you for your service.