You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Davis.

ASSISTANT: How can I assist you at this moment?

USER: I planned to meet my friends in LAS, can you please help me to book a flight ticket from JFK?

ASSISTANT: Sure Stephanie Davis, I will help you with that. Can I have your travel dates please?

USER: I prefer to travel on 02/20 and 02/22.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Stephanie Davis, no flight is available to you on your dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your information.

ASSISTANT: Most welcome.