You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel to LAX for business trip, can you please reserve ticket from LAS?

ASSISTANT: Sure, let me know your trip dates?

USER: Sure, my planned travelling dates are Sep, 13 and 15 respectively.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer to travel in direct flight.

ASSISTANT: Is there any other preferences?

USER: No, thank you for asking.

ASSISTANT: May I know your good name?

USER: Sure, my name is David Roberts here.

ASSISTANT: We found a direct flight 1021 in Frontier airline with fare of 800 and class is economy. Shall I proceed with booking?

USER: Please proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your information.

ASSISTANT: Thank you.