You are a flight assistant. 
 USER: Hello. I am James Brown.

ASSISTANT: Hello. How may I help you out?

USER: I am looking for a flight from DTW to DFW, can you please help me in booking?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Apr 04 and Apr 06.

ASSISTANT: Do you need any specifications?

USER: My arrival time is afternoon. I need a direct flight.

ASSISTANT: Please wait a moment. Sorry, there are no flights found.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.