You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Lopez here.

ASSISTANT: Nancy, how can I assist you?

USER: I want to sell my casino in Las Vegas, so please book my ticket from SEA to LAS.

ASSISTANT: Sure, I am here to help you. Let me know your travel dates.

USER: My itinerary dates are 03/31 and 04/02.

ASSISTANT: Flight-1003 is available with Spirit airlines and the ticket fare is 200 only. Shall I book the ticket for you?

USER: Please book my ticket.

ASSISTANT: Nancy, your ticket is confirmed and your flight number is 1003.

USER: Thank you.

ASSISTANT: You are most welcome and thank you for choosing us.