You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Anna Brown here. I would like to book a ticket from DEN to MSP.

ASSISTANT: Sure, may I know your trip dates please?

USER: My itinerary travel dates are Dec 24 and Dec 26.

ASSISTANT: Please wait for a while.

USER: I would like to travel with Zero connection flight and return time should be afternoon.

ASSISTANT: Ok. Thanks for waiting and sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, Thank you for your time.

ASSISTANT: Most welcome.