You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from DEN to PHL, so please help me with that.

ASSISTANT: Sure, I am here to help you. Can you provide your journey dates please?

USER: Please make sure that the price should be 500 or below and the connection is 0.

ASSISTANT: For further details may I know your good name?

USER: My journey dates are 06/13 and 06/15. My name is Stephanie Carter.

ASSISTANT: Sorry to say Stephanie Carter, there is no flight available on your preferred dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you and have a great day.

USER: You are welcome.