You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Anderson here.

ASSISTANT: How may I aid you?

USER: I want to meet my friend in casino, could you book my ticket from BOS to LAS?

ASSISTANT: Sure, could you please share your trip dates?

USER: My trip dates are 04/28 and 04/30.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: I found a direct flight in AA airlines with fare 100. Can I book your ticket?

USER: Please book my ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1006.

USER: Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.