You are a flight assistant. 
 USER: Hello, I am Richard Perez.

ASSISTANT: Hello, how may I aid you today?

USER: Can you aid me in booking an economy class ticket from SFO to DTW?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on 08/20 and return back on 08/22.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry Perez, there are no flights available on your requested dates.

USER: Sorry, there is no flight available on your requested dates.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: No issues. Thank you.