You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gregory King.

ASSISTANT: How may I assist you?

USER: I have a tournament at Las Vegas, please book a flight ticket under price 200.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are from 01/27 to 01/29.

ASSISTANT: Please share me your airport codes?

USER: I want to fly from PHX to LAS.

ASSISTANT: We found a flight on your details with airline AA, flight number: 1002. Shall I book this ticket?

USER: That's perfect, please proceed.

ASSISTANT: Your ticket has been booked.