You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Seattle to meet my sister, can you please help me in booking a flight ticket from DTW to SEA?

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

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements?

USER: I want to return in afternoon.

ASSISTANT: May I know your name please?

USER: My name is Patrick Adams.

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

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

ASSISTANT: Thank you for opting us.