You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Steven Lewis. Can you please book a ticket from LAX to DFW?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are on Feb 10 and Feb 12.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Can you please share your depart and arrival time?

USER: My depart time is afternoon,.

ASSISTANT: Do you have any other preferences?

USER: I need a business class.

ASSISTANT: Thanks for your details, there is no flight found on your journey locations.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.