You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Eric Baker.

ASSISTANT: How may I help you?

USER: I would like to visit Orlando. Can you help me for booking a flight ticket from LAX to MCO?

ASSISTANT: Sure, I will help you. Please provide me your trip dates.

USER: My travelling dates are Sep 13 and Sep 15.

ASSISTANT: Ok, do you have any preferences?

USER: I need a single connecting flight.

ASSISTANT: Ok, may I know your requirements?

USER: My return time is evening.

ASSISTANT: Do you have any class preference?

USER: Any class is fine for me.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome and have a nice day.