You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me in booking my flight ticket from LAS to JFK?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: My trip dates will be July 21st to July 23rd.

ASSISTANT: Do you need any layover in between  journey?

USER: I prefer a connecting flight.

ASSISTANT: Please let me know if you have any other specifications?

USER: My depart time should be in the afternoon.

ASSISTANT: May I know your name please?

USER: I am Emma Lee.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: Its ok, thank you.

ASSISTANT: You are most welcome.