You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you please book a ticket from SFO to MCO to attend Science festival?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are Oct 25 and Oct 27.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I want single connected flight.

ASSISTANT:  For booking, we need your good name. Please mention it.

USER: Sure, I am Brandon Roberts.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.