You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid your at this moment?

USER: I want to meet my friend in Orlando. Can you please help me in booking flight ticket from IAD to MCO?

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

USER: My travel dates are Feb 23 to Feb 25.

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

USER: I am ok with any timing.

ASSISTANT: Are you looking for any specific class to have?

USER: I always prefer to travel in business class.

ASSISTANT: Do you need any break in between your journey?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name please to proceed further?

USER: Myself Jeffrey Smith.

ASSISTANT: Ok, please wait a moment to check availability of flight for you.

USER: Sure.

ASSISTANT: Sorry Jeffrey Smith, no flight is available to you with business class as all business class tickets have filled.

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

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