You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Christine Hill.

ASSISTANT: How may I assist you now?

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

ASSISTANT: Ok, can you please share your travelling dates?

USER: I want to travel on 08/07, and return on 08/09.

ASSISTANT: May I know your depart and return time?

USER: I want to depart in afternoon and return in the evening time.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight,.

ASSISTANT: Sorry to say, there is no flight available for your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing our services.

USER: Thanks for the information.

ASSISTANT: Have a safe day.