You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how may I help  you?

USER: Can you please book a flight ticket from LAX to MSP?

ASSISTANT: Sure, I am here to help you. May I know your travel dates?

USER: Thank you. I have planned my travel dates as Feb 15 and Feb 17.

ASSISTANT: Ok, please mention your class preference.

USER: I would prefer business class so please make sure that.

ASSISTANT: Is there any other specifications?

USER: Yes, I am looking for single connecting flight.

ASSISTANT: May I know your name?

USER: Sure, myself Dennis Davis.

ASSISTANT: Sorry to intimate you that, there are no flights available in the business class.

USER: Oh! It is sad to hear. Anyway, thank  you for your time.

ASSISTANT: You are most welcome. Have a nice day.