You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to visit Dallas for celebrating my sister's marriage. Please, assist me to book a flight ticket from Las Vegas, NV - LAS.

ASSISTANT: May I know your trip dates?

USER: My trip dates are 02/25 and 02/27.

ASSISTANT: Can you please mention your destination code?

USER: My destination code is TX - DFW.

ASSISTANT: I found a flight with 100 fare and 1013 flight number.

USER: Yes, please book this flight in the name of Larry Green.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for the booking.

ASSISTANT: Most welcome.