You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Thomas here.

ASSISTANT: How can I assist you at this moment?

USER: I want to meet my friend in casino, so please book my ticket from SFO to LAS.

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: My trip dates are 10/17 and 10/19.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Spirit airlines is available on this route with a ticket fare of 100 and 1 connection limit, shall I book your ticket with this airlines?

USER: Go ahead to book my ticket.

ASSISTANT: William Thomas, your ticket is booked with flight number 1000.

USER: Thank you.

ASSISTANT: Thank you, have a safe journey.