You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please book a ticket from DTW to DEN to participate in Olympics.

ASSISTANT: Please share your travel dates?

USER: My scheduled dates are Aug 1 and Aug 3.

ASSISTANT: Do you have any class preferences?

USER: I prefer business class.

ASSISTANT: Do you have any connection preferences?

USER: I would like to fly in single connected flight.

ASSISTANT: Is there any other concern?

USER: My return time is evening.

ASSISTANT: May I know your name please?

USER: Sure, I am Jeffrey Hernandez.

ASSISTANT: Sorry, no flights found as per your preferences.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you.