You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel in a business class flight, can you please find out a flight for me?

ASSISTANT: Sure, may I know your travel dates?

USER: Thank you, my departure is on Nov 04 and please book my return ticket on Nov 06.

ASSISTANT: Where do you want to travel?

USER: I want to start from EWR and I would like to prefer LAS as my destination.

ASSISTANT: Please share me your name.

USER: Sure, my name is Christine Evans.

ASSISTANT: Do you have any specifications?

USER: I will prefer single connection.

ASSISTANT: Flight-1006 is available with American airlines having single connection and the ticket costs you 100 only in economy class. Are you comfortable with this flight?

USER: I have told you, I want to travel in a business class flight.

ASSISTANT: Sorry, there is no flight on your details.

USER: Oh! Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you.