You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please reserve me a flight ticket from DEN to DCA?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my travel dates are from Aug 03 to Aug 05.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer to travel in a connecting flight.

ASSISTANT: May I know your name?

USER: Pamela Carter here.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.