You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Could you please check the flight availability in business class?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: My name is Frank Collins.

ASSISTANT: Please share me from which city you planned to travel?

USER: I am heading to LGA from DTW.

ASSISTANT: Please mention on which dates would you like to fly?

USER: I want to travel on Aug 27 and return on Aug 29.

ASSISTANT: Do you want a connecting flight or direct flight for this journey?

USER: I need a single connecting flight.

ASSISTANT: Is there any other preference related to booking?

USER: No.

ASSISTANT: Thank you for the details, sorry there is no seat is available in business class in any flight.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.