You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Ashley Scott. Can you please help me in booking my flight ticket from DTW to LAS?

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

USER: My travelling dates are Mar 03 and Mar 05.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: May I know your class preferences?

USER: No. I need my depart flight at afternoon time.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Please be on hold.

USER: Ok, sure.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for availing us.