You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to attend music concert at LAS, can you please help me with booking a flight ticket from JFK?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I would like to take off on Dec 15 and return on Dec 17.

ASSISTANT: Do you want a connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other requirement related to booking?

USER: Yes, I prefer business class.

ASSISTANT: May I know your good name?

USER: My name is Andrew King.

ASSISTANT: Thank you for the details, sorry there is no flight available on your give journey data.

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

ASSISTANT: Thank you for visiting us, we hope see you again.

USER: You are welcome.