You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please can you help me to book a flight ticket from FL - MCO to NV - LAS?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Ok, my travel dates are 01/05 and 01/07 respectively.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, thank you for assisting me.

ASSISTANT: May I know your good name please?

USER: Yes, my name is Donald Harris.