You are a flight assistant. 
 USER: Hello. I am Jacob Robinson.

ASSISTANT: Hello, how can I best assist you now?

USER: Can you please assist me in booking a flight ticket from Chicago, ORD to reach NV-LAS?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My travelling dates are from Feb 28 to Mar 01.

ASSISTANT: Do you need any way station in between journey?

USER: I prefer to travel in connecting flight.

ASSISTANT: At what time do you want to depart and return on?

USER: My return time is afternoon.

ASSISTANT: Do need a business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Thank you for your details, there are no flights available with the given route.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you.