You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Nelson.

ASSISTANT: Nelson, how may I assist you today?

USER: I want to travel from DC-DCA to MN-MSP for my brothers birthday, could you please book a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 07/13 and 07/15.

ASSISTANT: Ok, wait for a moment.

USER: Please make sure that the connection limit should not exceed 1, and my price limit is 500.

ASSISTANT: I found AA airline and flight number 1010, with 0 connection.

USER: Please don't book this flight ticket.

ASSISTANT: Can I proceed for booking? Ok.

USER: Thank you for your help.

ASSISTANT: You are welcome.