You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to travel from LAS to MCO, can you please help me out with that?

ASSISTANT: May I know your travel dates?

USER: Thank you for accepting my request, my departure is on Sept 21 and please book my return ticket on Sept 23.

ASSISTANT: Do you have any connecting preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any time concern?

USER: Yes, I would like to departure in afternoon time.

ASSISTANT: May I know your name please?

USER: Sure, my name is James Jackson.

ASSISTANT: Sorry James, no flights found as per your preferences.

USER: Oh! Sad to hear that. Anyway, I will prefer another alternative. Thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: Welcome.