You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I would like to depart on Jan 21 and return on Jan 23.

ASSISTANT: May I know your depart time and return time?

USER: I would like to return during evening time.

ASSISTANT: Do you have any other requirements?

USER: I need a flight with 1 connection.

ASSISTANT: Ok, we found a Delta airline, flight number: 1011, return time: 2:00AM, price: 500 with one connection.

USER: Yes, please proceed with the booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.