You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: This is John Hernandez. I need you to book a flight ticket to reach Las Vegas, LAS with a connecting flight. Can you help me?

ASSISTANT: Sure, let me know your travelling dates?

USER: I want to start on 01/06. I will catch return flight on 01/08.

ASSISTANT: Please provide your origin airport code.

USER: Boarding from Philadelphia, PHL.

ASSISTANT: Let me know your specifications?

USER: I need a ticket within the fare 500.

ASSISTANT: AA airlines with single connection and price is 100 of 1008 flight. Shall I proceed?

USER: Ok, go on with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your instant help.

ASSISTANT: Thank you.