You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to fly from AUS to DEN. Can you check the flight availability on that route?

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

USER: My planned travel dates are 07/23 and 07/25.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable with direct flight only.

ASSISTANT: Is there any airline preference?

USER: No airline preference but make sure that, my return time should be afternoon only.

ASSISTANT: Please forward your name.

USER: Sure, Daniel Lewis here.

ASSISTANT: There are no flights found on your specified trip dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for availing us.