Hi, I am Patricia Taylor.
user
Hello Taylor, how may I guide you?
assistant
 I need to book a ticket from IAH to LAS for meeting my sister.
user
May I know your preferable dates of travelling?
assistant
Sure, My travelling dates 03/19 and return on 03/21. I prefer 1 connection with price of 500.
user
Flight number 1003 from Spirit airline is perfectly matches with your requirements.
assistant
You can proceed with booking.
user
Your ticket is confirmed.
assistant
Thank you for booking.
user
Thank you for choosing our service.
assistant