You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a flight ticket from DTW to ORD to attend a business meeting?

ASSISTANT: Sure, may I know your name please?

USER: Myself Eric Wright.

ASSISTANT: Please share me your travel dates?

USER: Feb, 6 and Feb, 8 are my travel dates.

ASSISTANT: At what time do you like to return and depart?

USER: I need to return at morning time.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight and prefer to travel in business class.

ASSISTANT: Sorry Eric Wright, there is no flight at this moment.

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

ASSISTANT: Thank you for choosing us.