You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Jones.

ASSISTANT: How can I assist you today?

USER: I need to reach Las Vegas on June 21st to attend an interview and my return date will be on June 23rd, could you please help me to book an economy class ticket?

ASSISTANT: Please can I know the airport codes to check?

USER: My source airport code is JFK and my landing airport code is LAS.

ASSISTANT: Ok, please can you wait a moment while I check the availability?

USER: Sure.

ASSISTANT: There is a flight ticket available with 1 connection limit and the airfare is 800. Can I book the flight ticket who's airlines is Southwest?

USER: That's perfect, you can book the ticket.

ASSISTANT: Ok, the flight ticket is been booked and the flight number is 1011.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for choosing our agency.