You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a business class flight to DTW from PHL?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Thank you for considering my request. My name is Melissa Moore.

ASSISTANT: Thank you. Can you please help me with your travel dates?

USER: Sure, my travel dates are Aug 20 and Aug 22.

ASSISTANT: Sure, is there any class preference?

USER: I have already mentioned you above that I need a business class flight.

ASSISTANT: Ok, please wait. Let me check for the available flights.

USER: Sure, Kindly please check the connecting flight for my journey.

ASSISTANT: Sorry, there is no flight available as per your requirements.

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

ASSISTANT: You are welcome and have a nice day.