You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from DEN to BOS, can you please help me?

ASSISTANT: Sure, May I know the travelling dates?

USER: I planned my trip on the dates Feb 27 and Feb 29.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No, other specifications.

ASSISTANT: May I know your name?

USER: Myself Margaret Evans.

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

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for opting us.