You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Kenneth Evans here. I'm planning to visit New York, can you please book a ticket from CLT to EWR?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my planned departure and return travel dates are 27th and 29th of May.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a business class ticket.

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

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us, have a nice day.