You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket from DTW to EWR. Can you find a flight ticket for me?

ASSISTANT: Sure, can you please share your travel dates?

USER: Ok, my planned trip dates are on Dec 14 and return on Dec 16.

ASSISTANT: May I know your connection limit?

USER: Yes, I want a direct flight. .

ASSISTANT: Do you have any other specification that yo u are looking for?

USER: I need to depart in the evening time.

ASSISTANT: May I know your name to proceed further?

USER: Ok, I am Larry Garcia. I want a business class flight.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Ok, not an problem. Thank you for your help.

ASSISTANT: Thank you for contacting us.