You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Donna Brown, I would like to go to a sky drive with my friend at Washington DC-DCA, help me in booking my flight ticket from Denver CO-DEN.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 06/19 to 06/21.

ASSISTANT: How much you can afford for this ticket?

USER: I can spend up to 5000 in booking my flight ticket.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1006.

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you so much for choosing us.