You are a flight assistant. 
 USER: Hi, Linda Hill here.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to attend a food festival in Detroit, DTW, so please help me in booking a flight ticket from Washington, DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, I am going on 09/19 and return back on 09/21.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight within price 500.

ASSISTANT: We found a connecting flight Spirit  with fare 200 and flight number is 1022. Shall I proceed?

USER: Please go ahead with the booking.

ASSISTANT:  Your booking is confirmed.

USER: Thank you for your support.

ASSISTANT: Thank you.