You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I need to book a flight ticket from IAH to JFK to enjoy film festivals.

ASSISTANT: Sure, on what dates are you planning to travel?

USER: Sure, my scheduled dates are Nov 19 and Nov 21.

ASSISTANT: How many connections do you need?

USER: I need a connected flight.

ASSISTANT: Do you need an economy class or business class?

USER: I would prefer a business class.

ASSISTANT: Is there any other requirements?

USER: I want to fly in a normal-cost airline.

ASSISTANT: May I know your name?

USER: Sure, Brandon Thomas here.

ASSISTANT: Thanks for providing your details Brandon Thomas, we are unable to provide any flights on your required dates due to some technical up-gradation at your destination.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.