You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to travel from PHL to LAS, could you book my ticket?

ASSISTANT: Surely, I will help you out. When are you willing to travel?

USER: My itinerary dates are Apr 18 and Apr 20.

ASSISTANT: Ok, please share your connection limit.

USER: I prefer a connecting flight.

ASSISTANT: Is there any time concern?

USER: No. I would like to travel in normal-cost airlines.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Samuel Parker here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight in business class and the fare is 300. Shall I proceed in United Airlines?

USER: Book my ticket.

ASSISTANT: Ok, your ticket has been confirmed and the flight number is 1000.

USER: Thank you.

ASSISTANT: Thank you for choosing us.