You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I need you to book a flight ticket.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: June 15 and 17 are my planned travel dates.

ASSISTANT: Ok, can you please provide your airport codes?

USER: DEN and IAD are my in and out airport codes.

ASSISTANT: Ok, do you have any specifications?

USER: I prefer to fly in a economy class.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok, make sure that there is a break in my journey.

ASSISTANT: I found a flight for you with United Airlines and it costs you 200. Shall I proceed to reserve a seat in this single connecting flight?

USER: Good, please reserve the seat.

ASSISTANT: On whose name you would like to book this ticket?

USER: I need to fly. Please book on my name Cynthia Evans.

ASSISTANT: Your ticket has been booked with 1004 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.