You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Gregory Evans. I want to book a flight ticket from DC-IAD to CO-DEN. Can you help me?

ASSISTANT: Sure, please share your planned trip dates?

USER: 03/27 and 03/29 are my travelling dates.

ASSISTANT: Ok, any other requirements to be met?

USER: I need a connecting flight.

ASSISTANT: Ok, no flights found with your requested details.

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.