You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Brown here.

ASSISTANT: How can I help you Jerry today?

USER: I want to meet my friend in Dallas on 09/06. Can you please help me to book a flight ticket from LAS?

ASSISTANT: Sure, I can help you in booking flight ticket. May I know your destination airport code name?

USER: My destination code is DFW.

ASSISTANT: Do you need any help from us for booking return flight ticket?

USER: Yes, I need return ticket on 09/08 date.

ASSISTANT: Ok, please wait a moment. Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Ok, sure. Ok, fine. Thank you for your help.

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