You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you for the day?

USER: Can you help me to book a business class ticket for my trip?

ASSISTANT: Sure, I am here to help you with that. May I know your preferable airport codes, please?

USER: My travelling airport codes are LAX and ATL.

ASSISTANT: Can you please share your respective travel dates?

USER: My planned travelling dates are Aug 11 and 13.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I am fine with any time to travel.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: There are no flights found on this route as per your travel dates.

USER: No issues with that.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is Thomas Carter. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.