You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me to book a flight ticket from LAX to LAS?

ASSISTANT: May I know your travel dates?

USER: My trip dates are Mar 15 and Mar 17.

ASSISTANT: Do you have any connecting flight preferences?

USER: I need a single connecting flight.

ASSISTANT: Is there any other concern?

USER: I prefer a normal cost airline.

ASSISTANT: May I know your name please?

USER: I am Rebecca Scott.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.