You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Patrick Roberts here. I am planning for a word trip, so I am starting my trip from Orlando-MCO to ATL.

ASSISTANT: Ok, can you provide the preferable dates you wish to travel?

USER: Travel dates are from  08/08 and return on 08/10.

ASSISTANT: Sorry to inform you that there is no flight available for your requested dates.

USER: That's fine, thank you for your help.

ASSISTANT: Most welcome. Have a great day.