You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: As I am scientist, I got an invitation from Las Vegas institute of arts to give a speech. Can you do the reservation?

ASSISTANT: Ok. May I have your name please?

USER: Margaret Baker here.

ASSISTANT: Could you help me with your airport codes?

USER: My airport codes are PHL-LAS.

ASSISTANT: Let me know your journey dates.

USER: Dates are 09/11 and 09/13.

ASSISTANT: Flight with 1 connection of price 100 in Southwest airline of 1012 flight. Can I reserve your ticket?

USER: Go ahead.

ASSISTANT: Ok, booking was done.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.