You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nicholas Evans.

ASSISTANT: How may I aid you today?

USER: I would like to visit Los Angeles. Can you help me for booking a flight ticket from LAS to LAX?

ASSISTANT: Sure, I will help you with that. Can you please mention your travelling dates?

USER: My travelling dates are Jan 20 and Jan 22.

ASSISTANT: Is there any specific timings in your departure and arrival?

USER: My return time is afternoon.

ASSISTANT: Do you have any class preference?

USER: Any class is fine for me.

ASSISTANT: Any connection limit do you have?

USER: I need a single connecting flight.

ASSISTANT: Wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We are apologize that, there are no flights running towards your region with your requested dates of travelling.

USER: That's ok, thank you for checking.

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

USER: Welcome.