You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to buy a plane ticket from DCA to CLT. Please help me in that.

ASSISTANT: May I know your desired travel dates please?

USER: My travel dates are from Aug, 11 to Aug, 13.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: John Campbell.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for  booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked, flight number 1012 with AA airlines.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.