You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Roberts Lopez. I want to book a ticket from IAD to CLT to attend seminar, can you help me?

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

USER: I am departing on 07/21 and return on 07/23.

ASSISTANT: There is a flight available on your requested dates from Delta airlines with 1 connecting flight.Shall I confirm your booking?

USER: Please proceed for booking.

ASSISTANT: Your ticket is booked with flight 1025.

USER: Thank you for your help.

ASSISTANT: You are welcome.