You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to celebrate my birthday at Las Vegas, could you book my ticket from Denver?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your trip dates?

USER: My itinerary dates are June 11 and June 13.

ASSISTANT: May I know your name please?

USER: Lisa Harris here.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I have no other requirements.

ASSISTANT: As per your data, there is a flight with Southwest Airlines and the ticket fare is 200. Would you like me to make the booking now?

USER: Please book my ticket.

ASSISTANT: Lisa Harris, your ticket is reserved in business class with the flight-1021.

USER: Thank you for your service.

ASSISTANT: Thank you very much for contacting our agency.