You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: I prefer to travel on Oct 25 and Oct 27.

ASSISTANT: May I know your name for further process?

USER: I am William Walker.

ASSISTANT: Is there any additional preferences do you have?

USER: I need a direct flight.

ASSISTANT: Do you have any another specifications?

USER: I would like to travel in economy class.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for reaching us.