You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Harris.

ASSISTANT: How may I aid you today?

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

ASSISTANT: Harris, can you please mention your travelling dates?

USER: Sure, I would like to take off on 08/15 and return back on 08/17.

ASSISTANT: Please wait a moment.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: There is a flight available with one connection and the price is 200, can I proceed ?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been booked with the flight number 1023 and it is AA airlines.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for choosing our service.

USER: You are welcome.