You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can i help you today?

USER: Can you please help me to book a flight ticket from DEN to DFW?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are May 26 to May 28.

ASSISTANT: Let me know your connection limit?

USER: No.

ASSISTANT: Any other requirements to be met?

USER: I would like to depart in the afternoon.

ASSISTANT: Can i have your name please?

USER: My name is Angela Walker.

ASSISTANT: Sorry, no flights found with your given details.

USER: No problem, thanks for your information.