You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I want to book a ticket from SFO to MCO. Could you book a ticket?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Departure is on July, 16 and return date is July, 18.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I would like to depart in the morning.

ASSISTANT: Do you prefer any specific class to travel?

USER: I would like to prefer business class.

ASSISTANT: Do you have any other specifications?

USER: I would be comfortable with single stop over.

ASSISTANT: Can I have your good name please?

USER: My name is Richard Wilson.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates in business class.

USER: Thank you.

ASSISTANT: Thank you for choosing us, have a good day.