You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I would like to meet my brother at Los Angeles, please help me in booking a ticket from MCO to LAX.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My planned travel dates are on Jan 12 and Jan 14.

ASSISTANT: Ok, could I have your name please?

USER: My name is Dennis Jones.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, please allow me a moment.

USER: I prefer business class for my trip.

ASSISTANT: Sorry, there is no flight on your requested  travelling dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome, have a great day.