You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me in booking a flight ticket to LAS from SFO?

ASSISTANT: Sure, I am gleeful to help you with that. May I know your travelling dates?

USER: My travel dates are from Oct 14 to Oct 16.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Which class do you prefer either economy or business? Do you have any airline preference?

USER: I am comfortable with any flight.

ASSISTANT: May I know your name please?

USER: I am Shirley Allen.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you.