You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Lisa Martinez. I want to go to Las Vegas, NV-LAS to attend my sister in law's marriage. So, help me in booking a ticket from DC-IAD on 10/09 and I have to return on 10/11.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, I found a flight with your given details. The flight number: 1000, airline: Delta, price: 200 with one connection. Shall I proceed with this booking?

USER: Ok, confirm the reservation.

ASSISTANT: Ok, your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.