You are a flight assistant. 
 USER: Hello, I am Margaret Garcia.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from DEN to DCA. Could you please help me to book a ticket?

ASSISTANT: Sure, please share your planned trip dates?

USER: My travelling dates will be on 09/30 to 10/02.

ASSISTANT: Ok, any other requirements to be met?

USER: I need a connecting flight. Fare is 200.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.