You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a ticket for me?

ASSISTANT: Sure, could you please provide your name?

USER: Mary martin.

ASSISTANT: May I know your origin and destination airport codes?

USER: The origin is denver, CO - DEN and destination is washington, DC - DCA.

ASSISTANT: OK, could you please provide your journey dates?

USER: The departure is on 02/27 and return is on 02/29.

ASSISTANT: Is there any restrictions in connections and price?

USER: The connection limit is 0. The price limit is 1000.

ASSISTANT: Just give me a moment to check.

USER: OK.

ASSISTANT: I have found a flight for you but it is under 2 connections.

USER: OK. Don't proceed with the booking.

ASSISTANT: Connections is necessary for you?

USER: Sorry I don't want to proceed.

ASSISTANT: OK, unfortunately there is no flight under 0 connections.

USER: OK. Thank you for the help.

ASSISTANT: Thank you, have a great day.