You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to search a flight with 1 connection limit?

ASSISTANT: Sure, I am here to help you out.  Please provide me your location airport codes.

USER: Thank you, the airport codes are from DC-IAD to DC-DCA.

ASSISTANT: Can you share me your trip dates?

USER: The travelling dates are 03/20 to 03/22.

ASSISTANT: May I know your name?

USER: Sure, my name is Mary Smith.

ASSISTANT: Here is a direct flight with airfare of 100, can I proceed with it?

USER: No, I want the flight with 1 connection limit.

ASSISTANT: Sorry Smith, here I didn't find a flight in your route.

USER: Thank you.

ASSISTANT: Thank you for reaching us.