You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to book a flight from DCA to MSP?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are Oct 05 to Oct 07.

ASSISTANT: Do you have any connecting flight preferences?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Jerry Smith.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Thank you for checking.

ASSISTANT: Thank you for choosing us.