You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Brian Brown here. Can you please help me in booking a flight ticket from CLT to ATL?

ASSISTANT: Sure, can I know your travelling dates?

USER: My trip dates are 09/19 - 09/21.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class to travel.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.