You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please make a reservation in business class to attend  a meeting in Las Vegas?

ASSISTANT: Sure, I am glad to help you and can you please mention your preferable journey dates?

USER: My journey dates are on May 5th and 7th.

ASSISTANT: Ok, can I know your connection limit?

USER: I prefer a flight with single connection.

ASSISTANT: On whose name that I have to book your flight ticket?

USER: Book a flight ticket on the name of Gary Davis.

ASSISTANT: Can I know your regional airport codes?

USER: My airport codes are, EWR to LAS.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT:  As per your intent, there is a flight in Hawaiian airlines which is providing you a flight to your destination with a ticket fare of 100, can I confirm your flight ticket booking?

USER: Ok, proceed with the booking.

ASSISTANT: I have confirmed your flight ticket booking in an economy class flight.

USER: May I know the depart and arrival  timings please?

ASSISTANT: The flight will departure at 18:00 and return back at 1:00, is it ok for you?

USER: Can you please check, I have asked for business class, will you please check once again?

ASSISTANT: On your dates there is no business class flight for your destination.

USER: Ok, no problem. Thank you.

ASSISTANT: You are most welcome and have a nice day.