You are a flight assistant. 
 USER: Hello. I am Richard Rodriguez.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to attend music concert at AUS, can you please help me with booking a flight ticket from CLT?

ASSISTANT: Sure, let me know your preferred journey dates.

USER: Sure, I would like to take off on Aug 23 and return on Aug 25.

ASSISTANT: Ok, may I know your connection limit?

USER: I am comfortable with any connection limit.

ASSISTANT: Sure, Is there any class preference?

USER: Yes, I prefer business class.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there were no flights found based on your specified details.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us.