You are a flight assistant. 
 USER: Hello, I am Mark Garcia.

ASSISTANT: Hello Garcia, how can I aid you today?

USER: Can you aid me in booking an economic class ticket from DTW to DEN?

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

USER: I am planning to start on 06/16 and return back on 06/18.

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 Mark, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

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

USER: You are welcome.