You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

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

ASSISTANT: Your travelling dates pleas?

USER: My travelling dates are June 25 and June 27.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight which departures in the afternoon which returns in the evening.

ASSISTANT: May I know your name please?

USER: Sure, my name is Shirley Harris.

ASSISTANT: I am sorry no flights found on your route.

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

ASSISTANT: Thank you for choosing us.