You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Donna Robinson here, can you help me to book a flight from DEN on 08/27?

ASSISTANT: May I know your return date and destination airport code you are willing to travel?

USER: I am planning to visit Washington DCA, so please book a flight to DCA. I will be return on 08/29.

ASSISTANT: We have found a connected flight with Spirit airlines, flight number 1023 and the fare of 600.

USER: Proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Your welcome.