You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: Help me to book a ticket for Los Angles CA-LAS, from there I will visit Hollywood.

ASSISTANT: Ok, May I know the origin point and travelling dates?

USER: Sure, I will take flight from Forth Worth, TX-DFW. My travel dates for departure is 02/28.

ASSISTANT: Can I know the Arrival date?

USER: I am returning on 03/01.

ASSISTANT: Ok, wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, May I know your good name?

USER: Jacob Robinson.

ASSISTANT: We are sorry to notify you, according to your preferred dates, we do not have any flights.

USER: Thank you for helping me.

ASSISTANT: Thank you, Have a great day.