You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me in booking a flight ticket from CLT to ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to fly on Nov 16 and return on Nov 18.

ASSISTANT: On which name shall I reserve flight ticket?

USER: Please reserve with the name of Richard Hernandez.

ASSISTANT: Do you need any specifications?

USER: I would like to prefer a business class.

ASSISTANT: Sorry, there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing our service.