You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Lisa Brown. I want to attend my brother's wedding at Minneapolis. Could you please help me to book my flight ticket from LAS to MSP?

ASSISTANT: Sure, may I know your planned travel dates to check for the flight availability?

USER: Yes, I would like to depart in the afternoon on Aug 15th and I will return back on Aug 17th.

ASSISTANT: Do you have any specifications?

USER: I need business class.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 400 in business class. Shall I proceed in booking?

USER: Yes, you can book the ticket for me.

ASSISTANT: Your ticket has been confirmed for the flight 1012 in Delta airlines.

USER: Thank you so much for helping me.

ASSISTANT: Thank you for reaching us.