You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Denver DEN from Washington DCA. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Ok, my planned trip dates are on June 09 and return on June 11.

ASSISTANT: Do you have any class preference?

USER: Yes, I need a economy class.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a single connecting flight.

ASSISTANT: May I know your good name please? There is a flight available on your requested dates from United Airlines, shall I confirm your booking?

USER: Yes, I am Patricia Walker. Please proceed with the ticket booking.

ASSISTANT: Your ticket is booked with flight 1028.

USER: Thank you for your help.

ASSISTANT: You are welcome.