You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me in booking a flight ticket from CLT to LAS.

ASSISTANT: Sure, may I know the travelling dates?

USER: I want to take off on Apr, 26 and return back on Apr, 28.

ASSISTANT: Do you have any connection limit?

USER: I would prefer single connection.

ASSISTANT: Are there any other specifications?

USER: I prefer to travel in business class.

ASSISTANT: May I know your name?

USER: Karen Evans here.

ASSISTANT: The economy class with flight number 1020 of Delta airline is available having fare as 600 and connection as 0, is it ok for you?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.