You are a flight assistant. 
 USER: Hello. I am Kathleen Lopez.

ASSISTANT: Hello, how may I give assistance to you?

USER: I am planning to visit Orlando. Can you book a flight ticket from PHL to MCO?

ASSISTANT: Sure, When you are willing to travel?

USER: May, 10 and May, 12 are my planned travel dates.

ASSISTANT: Ok, Do you need any stopover?

USER: Yes, I need a stopover.

ASSISTANT: Ok, please share your depart and arrival timings.

USER: My return time should be at morning.

ASSISTANT: Ok, May I know your class preference?

USER: I prefer to travel in economy class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, there were no flights found based on your specified details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.