You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from LAS to JFK?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: My travel dates are Nov 30 to Dec 02.

ASSISTANT: Do you prefer any break in between journey?

USER: I prefer connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: My depart time should be afternoon.

ASSISTANT: May I know your good name?

USER: I am Helen Wilson.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.