You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Raymond Smith. Can you please make a reservation from BOS to EWR?

ASSISTANT: Sure, may I know your planned travel dates to proceed further?

USER: Sure, my travelling dates are from Feb 28 to Mar 1.

ASSISTANT: Please share your preferable depart and return time.

USER: I want to return in the evening time.

ASSISTANT: Sure, is there any other preference do you have?

USER: Yes, I need a connecting flight in an business class with normal-cost airline.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight available on given journey details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you.