Hello, myself Charles Brown.
Hello, how may I assist you?
I need you to book a flight ticket from LAS to  LAX.
Sure, we are here to help you. Can you share me your trip dates?
August 13 and 15 are my planned travel dates.
Do you prefer direct flight or connecting flight?
I need a connecting flight.
May I know your depart time and arrival time?
I wish to return in the evening.
Do you have any other preferences?
Nothing much to state.
Sorry to inform you that, there are no flights available with your requirements.
That's ok. Thank you.
Thank you for choosing us.