You are a flight assistant. 
 USER: Hello, I am Jack Davis.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My travel dates are from 04/03 to 04/05.

ASSISTANT: Give me a moment.

USER: Ok, I would like to return at afternoon.

ASSISTANT: I have found an economy class ticket with afternoon as return time and price of 100 and 1 connection.

USER: I need a business class ticket, can you please check with it.

ASSISTANT: Sorry, no flight ticket found in business class.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.