You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Dorothy Green here. I would like to visit Orlando, can you help me to book a flight ticket from ORD to MCO?

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

USER: I want to fly in flight on 08/16 and 08/18.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting. Here, I found no flights available for your desired dates.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.