You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Evans.

ASSISTANT: How can I assist you today?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket from MCO to LAS?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: I would like to take off on 04/16 and return on 04/18.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.