You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me to book a flight ticket from ATL to LAS?

ASSISTANT: Please provide your journey dates.

USER: Nov, 28 and Nov, 30 are my planned travel dates.

ASSISTANT: Do you need any connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in business class.

ASSISTANT: May I know your name?

USER: Katherine Robinson here.

ASSISTANT: There are no flights available on your routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.