You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you book a flight ticket in my preferable travel dates Aug, 31 and Sept, 2?

ASSISTANT: Sure, can you please help me with the airport codes?

USER: DTW and LAX are my airport codes.

ASSISTANT: May I know your connection limit?

USER: I am comfortable with any number of connections.

ASSISTANT: Do you have any other requirement that you are looking for?

USER: I need to travel in business class only.

ASSISTANT: May I know your name to proceed further?

USER: My name is Dennis Adams.

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

USER: That's ok, not a problem. Thank you.

ASSISTANT: Thank you for contacting us.