You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Can you help me to book a business class ticket?

ASSISTANT: Sure, I will help you to book a flight ticket in business class. Please provide me your source and destination point?

USER: Sure, my source and destination airport codes are DFW and LAS.

ASSISTANT: Please mention your planned journey dates?

USER: My travelling dates are June 29 and July 01.

ASSISTANT: Do you want a connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Is there any other preferences?

USER: No.

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

USER: No issues with that.

ASSISTANT: May I know your good name?

USER: My name is Nicole Perez. Thank you for your response.

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