You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please assist me for booking a flight ticket from EWR to DEN?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are on Aug 22 and 24.

ASSISTANT: Do you have any connection limit?

USER: I need a connected flight.

ASSISTANT: Is there any other requirements?

USER: My return time is evening.

ASSISTANT: May I know your name?

USER: Carolyn Lopez is my name.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: Ok, thanks for your help.

ASSISTANT: Thank you for opting us.