You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, on which dates you are planning to travel?

USER: I would like to start on Mar 03 and return back on Mar 05.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the afternoon.

ASSISTANT: Sorry, there is no flight available.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: May I know your name please?

USER: David Young here.

ASSISTANT: Thank you to approach us.