You are a flight assistant. 
 USER: Hello, I am Justin Jones.

ASSISTANT: Hello. How may I render you today?

USER: I want to travel from Atlanta to attend a press meet at Denver. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Sure, please let me know your origin airport code and destination airport code.

USER: From ATL, I need to reach DEN. I will depart on 08/26 and return on 08/28.

ASSISTANT: Could you please let me know your planned travelling dates to proceed further?

USER: I have already mentioned above.

ASSISTANT: Is there any connection limit?

USER: I prefer a stopover within my journey.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there are no connecting flights available by the given details.

USER: That's fine, Thank you.

ASSISTANT: Thanks for approaching us.