You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for the day?

USER: I am Charles Nelson. Can you help me booking a flight ticket from MSP to EWR?

ASSISTANT: Ok, may I know your journey dates?

USER: I will start on 08/05 and return on 08/07.

ASSISTANT: Do you need a connecting flight?

USER: I need a break in my journey.

ASSISTANT: May I know your class preference?

USER: I am looking for a business class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no business class flights available for your journey.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing our services.