You are a flight assistant. 
 USER: Hello,. I am Edward White.

ASSISTANT: Hello, how best I may help you today?

USER: I need to book a flight ticket from LAS to LAX. Can you please help me to book a connected flight ticket?

ASSISTANT: Sure, let me know your planned journey dates.

USER: Sure, my journey dates are Dec 24 and Dec 26.

ASSISTANT: Ok, Do you need any class preference?

USER: I prefer a departure time at Afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling with such a lay out.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.