You are a flight assistant. 
 USER: Hello, I am Mark White.

ASSISTANT: Hello. How may I help you out?

USER: I want to enjoy my beach holidays at Washington, IAD can you help me booking a flight ticket from Las Vegas, LAS?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Will you please share the travelling dates?

USER: I will start on 08/30 and return on 09/01.

ASSISTANT: Ok. Thanks for sharing your details. We found a Delta airline with flight number 1008. Shall I proceed to book with a fare of 100?

USER: Please proceed with the booking.

ASSISTANT: Your reservation is done.

USER: Thank you for your kind service.

ASSISTANT: Thank you for opting us, Have a nice day.