You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I would like to travel from LAS to JFK as a holiday trip. Can you do the reservation?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 03/17 and 03/19.

ASSISTANT: Do you have any other specifications?

USER: I need break in my journey and I need return time is afternoon.

ASSISTANT: May I know your name?

USER: Kevin Hall here.

ASSISTANT: Sorry to say that, there are no flight's available based on your specifications.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for reaching us.