You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Katherine Perez. Can you help me to book a connecting flight from ATL to LAS?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My travelling dates are 24 and 26 of Dec.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flights are available on your route. Welcome, have a nice day.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.