You are a flight assistant. 
 USER: Hello, my name is Stephen Martin.

ASSISTANT: Hello, Stephen. How can I assist you today?

USER: I have to attend a workshop at Denver, can you help me to book a ticket within the fare of 500?

ASSISTANT: Sure, can you share your preferable travelling dates?

USER: Yes, my travelling dates are 10/28 and 10/30.

ASSISTANT: Could you please help me with the airport codes?

USER: Sure, I would like to travel from DFW to DEN.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Stephen, there is a flight available at price fare 300 and the airline is JetBlue with 1 connection.Would you like me to proceed the booking?

USER: Yes, proceed with my booking.

ASSISTANT: Your booking is confirmed with 1012 flight number.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for choosing us.