You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me book my ticket from LAX to LAS?

ASSISTANT: Please provide your trip dates.

USER: My trip dates are Sep 14 and Sep 16 respectively.

ASSISTANT: Do you need any connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Do you need any other requirements?

USER: My depart should be in the afternoon.

ASSISTANT: May I know your name?

USER: Richard Scott here.

ASSISTANT: There are no flights available on your routes.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.