You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Brian Wilson. I am planning to travel from LAX to LAS for business trip. Can you please help me with booking a flight ticket?

ASSISTANT: Yes Wilson, may I know your travelling dates?

USER: Sure, my departure date is on 05/18 and the return date is on 05/20.

ASSISTANT: Wait for a moment.

USER: Sure. Please make sure that the price limit should not exceed 1000.

ASSISTANT: Yes, there is a flight 1011 of Southwest airlines.

USER: Thank you for the details. Can you please confirm the booking?

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you and have a safe journey.

USER: Thank you.