You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you help me booking a flight ticket from DEN to IAD?

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

USER: I will start on 08/13 and return on 08/15.

ASSISTANT: Do you have any connection limit preference?

USER: I need a break in my journey.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: I am Brandon Perez.

ASSISTANT: Brandon Perez, there are no flight services available on this route on your provided dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.